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    • Organ Systems
    • Portal to the Skeletal system
      • The SKULL ANATOMY
      • the Thoracic Cage
      • the vertebral column
      • The Appendicular Skeleton
      • BONES AND SKELETAL TISSUES
      • joints
    • The Muscular System Portal
      • Muscle Tissue
      • Muscles - Intramuscular Injection Sites - WCU
      • Muscles of the Body - Review
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    • Digestive System
    • Animal Dissection (Virtual)
    • dissection of the fetal pig
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    • Homeostasis - Physio
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    • Portal to the Skeletal system
    • Endocrine and Homeostasis physio
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    • Blood
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  • CMC Physiology Lab
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    • Case Study One
  • Anat & Physio
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    • Course Calendar - BIO 3070
    • Bio of Pregnancy - SYLLABUS
    • Course Information
    • Evolution of Human Pregnancy
    • History of Human Pregnancy
    • Myths of Pregnancy and Fertility
    • Female Reproductive System
    • The Menstrual Cycle
    • The Male Reproductive System and Male Contraception
    • Fertility and Conception
    • In-Vitro Fertilization
    • Infertility
    • Genetics of Reproduction
    • Prenatal and Maternity Care
    • The Pregnant Body
    • fetal development
    • Development of the Nervous System
    • Stages of Labor
    • Postpartum Issues
    • Twins
  • Chemistry
    • pH Lab
    • The Chemistry of Cells - ORGANIC
      • VOLCANO LAB
    • Volcano Project
  • College/Life Skills
    • Online Professionalism
    • Advising Resources
    • INTERVIEW SKILLS AND RESUME WRITING
    • DIVERSITY
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      • Predation
    • Time Management
  • Environmental Science
    • MIDTERM 2 STUDY GUIDE
    • Exam 2 Study Guide
    • ENVS 105 Home Page
      • Midterm 3 Study Guide Population Ecology
      • Ecology II - Communities and Ecosystems
      • Module 1 Assignments
      • Module 2 Assignments
    • Inrtoduction to ENV SCI
    • Historical Perspective of ​Environmental Science
    • Biomes
    • FOOD CHAIN and FOOD WEB
    • Biogeochemical Recycling
    • Evolution - Our Beginning
    • Genetic Inheritance
    • Evolution: How Populations Change over Time
    • Symbiosis
    • Population Ecology
    • Competition in Nature
    • Herbivory
    • Niches
    • Fossil Fuels
  • Environmental Biology Laboratory
    • SOILS AND GROUNDWATER
    • Ecological Roles of Living Organisms
      • The Basics
      • Bacteria - Ecological Roles
      • Protists - Ecological Roles
      • Fungus - Ecological Roles
      • Plantae and Animalia - Ecological Roles
    • Virtual FIELD TRIP TO THE RIO HONDO COLLEGE ​WILDLIFE SANCTUARY - Adaptations to Dry Climates
    • Microscopic Plant Adaptations
    • Natural Selection
    • GROWTH CURVES
    • SOILS AND GROUNDWATER
    • LC50 and LD50
    • How to Make a Solar Water Heater
    • WATER QUALITY ANALYSIS
  • General Biology
    • Characteristics of Life
    • Chemistry of Life - Inorganic
    • The Chemistry of Cells - ORGANIC
    • Introduction to The Cell
    • Photosynthesis and cellular Respiration
    • Cell Membranes and Osmosis
    • The Cell Cycle
    • REGULATION of The Cell Cycle
    • Mitosis
    • Meiosis
    • The Structure of DNA
    • Evolution
  • General Biology Laboratory
    • GENERAL BIOLOGY 101 LABORATORY HOME PAGE
      • Enzymes
      • OSMOSIS LAB
      • Lab 1 - Bacteria, Protista and Fungi
      • Lab 2 - Plantae and Animalia
      • Photosynthesis
      • Lab 5 - Introduction to Cells
      • Lab 6 - The Chemistry of Cells
      • Lab 7 - Membrane Transport
      • Lab 8 - Enzymes
      • Lab 9 - Photosynthesis
      • Lab 10 Fermentation, Aerobic Cellular Respiration and Associated Major Organ Systems
    • GENERAL BIO 1110L Labs
      • lab 2 - CELLS - BIO 111L
      • lab 3 - DIFFUSION and OSMOSIS - BIO 111L
      • lab 4 - The Circulatory System - BIO 111L
      • lab 6 - Photosynthesis and Cellular Respiration
      • lab 7 - Reproduction - BIO 111L
      • DNA, GENES AND GENETIC INHERITANCE
      • lab 9 - GENE EXPRESSION AND PROTEIN SYNTHESIS
      • lab 10 - ADAPTATIONS - BIO 111L
      • lab 11 - ECOSYSTEMS AND BIODIVERSITY
  • Human Biology
    • A History of Human Biology
    • Levels of Organization
    • The Chemistry of Cells - ORGANIC
    • Cells
    • Cartilage SAC
    • BONES AND SKELETAL TISSUES
  • Human Biology Lab
    • Testing for Sugar, Starch and Proteins
    • Osmosis, Diffusion and Filtration
    • buffers
    • OSMOSIS LAB
    • Anatomical Planes
    • Body Cavities and Membranes
    • Anatomical Positions
    • The Appendicular Skeleton
    • The SKULL
    • the Thoracic Cage
    • the vertebral column
  • Human Sexuality
    • Course Information
    • Course Calendar
    • Lesson 1 - Introduction to Human Sexuality
    • Lesson 2 - Genetic Inheritance of Human Sexuality
    • Lesson 3 - The Male Reproductive Tract
    • Lesson 4 - The Female Reproductive Tract
    • Lesson 5 - The Menstrual Cycle
    • Midterm Exam Study Guide
    • Lesson 6 - Fetal Development and Sexual Differentiation
    • Lesson 7 - Disorders of Sexual Development
    • Lesson 8 - Gender Identity and Sexual Attraction
    • Lesson 9 - Fetishism
    • Lesson 10 - Sexuality Throughout the World
    • ​Lesson 11 - Sexuality Through the Ages
    • Lesson 12 - Sexual Harassment, Coercion and Violence
    • Final Exam Study Guide
  • Microbiology PORTAL
    • Microbiology - CPP
      • ​Intro to Microorganisms
      • Diseases
      • EPIDEMIOLOGY
      • HOST DEFENSES
      • PATHOGENICITY
      • History of Microbiology
      • Levels of Organization cpp
      • Bacteria versus Archaea
      • Intro. to Bacteria
      • Viruses and Prions
      • Microbial Genetics
      • Microbial Nutrition and Growth
        • Nutritional Categories
        • Microbial Metabolism
        • CONTROL OF BACTERIA GROWTH AND ANTIBIOTICS
      • Eukaryotic Organisms
      • Archaeal Diversity
      • Prokaryotic and Eukaryotic Cells
      • Bacteria vs Archaeal Structures
      • Taxonomic Classifications
      • Archaea, Bacteria and Eukaryotic Cells
      • MIC- CPP Course Calendar
    • Cell Theory
    • Chemistry of Life
      • Chemical Bonds
      • Chemical Reactions
    • Biofilms
    • Definition of Terms
  • Microbiology Laboratory
    • Cell Culture and Inoculations
    • aseptic technique
    • WET MOUNT
    • Streak Plate
    • Mannitol salt agar (MSA) Test
    • Eosin Methylene Blue (EMB)
    • Blood Agar
    • Dilution Series and Calculations
    • Phage Plaque Assay
    • MICROBIOLOGY UNKNOWN LAB
    • Microbiology Lab -study guide exam one
    • Ex 2 - Microorganisms
    • EX 3 - aseptic technique
    • Ex 4 - Smear Prep
    • Ex 5 - Simple Stains
    • Ex 6 - Negative Staining
    • Ex 8 - Gram Stain
    • Ex 9 - Acid-Fast Stain
    • Ex 10 - Endospore Stain
    • Ex 11 - Motility Test
    • ex 12 -​ Pure culture technique
    • ex 13 - UV Radiation
    • Ex 14 - Enumeration of Bacteria : Standard Plate Count
    • ex - 15 Effects of Temperature on Growth
    • ex 16 - Hand-washing
    • ex 17 - pH and microbial growth
    • ex 18 - Evaluation of Antiseptics
    • ex 19 - Antibiotic Sensitivity : Kirby-Bauer Method
  • HISTOTECHNOLOGY
  • The Brain
  • The Brain
  • The Structure of DNA
  • Contact
  • FUN ZONE
    • GAMES
    • Video Vault
    • Population Ecology - ACTIVITY
    • The Carbon Cycle - ACTIVITY
    • Evolution - ACTIVITY
    • The Cell Game
    • SYMBIOSIS ACTIVITY
    • THE LORAX ACTIVITY
    • Brittney the Kidney
    • From Soup to Poop
    • MITOSIS - THE NURSERY RHYME
    • Verne the Sperm and friends
      • Verne the Sperm pg1
        • Verne the Sperm pg2
        • Verne the Sperm pg3
        • Verne the Sperm pg4
        • Verne the Sperm pg5
  • Lab 6 - The Chemistry of Cells
  • A History of Anatomy
  • List of Pages
    • Microscopes
  • Cell Membranes and Osmosis
  • Chemistry of Life
  • Muscle Movements
  • The Muscles of the Head, Trunk and Shoulders
  • The Muscles of the Limbs
  • Nervous Tissue
  • The Brain - Anat and Physiology
  • Instructions for Taking BIO 3070
  • MTH 121 Algebra A - Course Schedule and Info
  • Laboratory Calendar CMC Spring 2019
  • Genetics Lab
  • Chemistry and Conversions Lab
  • Digestion and Enzymes Lab
  • Endocrine and Homeostasis Lab
  • Muscles and Reflexes Lab
  • Sensory Lab
  • Immunohistochemistry
  • Blood Lab
  • Heart Rate, Blood Pressure, Electrocardiogram Lab
  • Respiratory Lab
  • Lab 11 Renal Lab
  • Blood Typing Game
  • Body Systems Interactive
  • Ch 9 - The Central Nervous System
  • Ch 10 - Sensory Systems
  • Neuron Virtual Laboratory
  • Virtual Eye Lab
  • Virtual pH Lab
  • Chemical Bonds Virtual Lab
  • Beer's Law Virtual Lab
  • Build-an-Atom Virtual Lab
  • Diffusion Virtual Lab
  • Ohm's Law Virtual Lab
  • New Page
  • Ch 8 - Nervous System

BLOOD LAB

LAB EXERCISE: Blood Cell Counts, Hemoglobin, Hematocrit, Blood Typing

Summary

   Blood tests are laboratory analyses performed on blood samples, usually from a vein in the arm. Blood tests can provide useful information about a persons’ health. 
​

Two sets of blood tests are routinely used in the hospital setting:
1) comprehensive metabolic panel
2) complete blood count


   A comprehensive metabolic panel (CMP) is a blood chemistry profile that provides a quick check for a wide variety of problems, such as high glucose, electrolyte imbalances, and markers of kidney or liver problems. 

   A complete blood count (CBC) is a blood panel that provides information about the patient’s blood, such as the cell count for each cell type and the concentration of various proteins and minerals. CBC tests are a valuable tool for a variety of disorders such as anemia, infection, and blood diseases. 

  

Precautions: ***Students must work with their own blood only. If you have a medical condition that prevents you from participating, please tell your instructor for accommodations.

 Blood is composed of plasma (composed of mainly water, proteins, & electrolytes) and formed elements (cells). The cells that circulate in the blood include leukocytes (white blood cells), erythrocytes (red blood cells), and thrombocytes (platelets). Abnormally high or low blood cell counts may indicate a variety of diseases and is the main reason why CBCs are routinely performed. ​
  Blood cells counts can be counted manually using a hemocytometer. A hematocrit provides the fraction, or percent, of red blood cells in the blood. The amount of hemoglobin in blood (expressed in g/dL) can be measured with a hemoglobinometer; a low level of hemoglobin can be a sign of anemia. Mean corpuscular hemoglobin concentration (MCHC), is the average amount of hemoglobin in red blood cells and can be calculated using hemoglobinometer and hematocrit results. Mean corpuscular volume (MCV) is the average volume of red blood cells.
Red blood cell count (106 RBCs/μL/mm3) (RBCs/μL/ mm3)
Hemoglobin concentration of blood (g/dL) 
Hematocrit (% RBCs)
Mean corpuscular hemoglobin (MCH) (μg/cell) 
Mean corpuscular hemoglobin concentration (MCHC) (%) = ([hemoglobin] * 100%) / hematocrit • Mean corpuscular volume (MCV) (um3) =(Hematocrit * 10) / (RBC count)

LAB EXERCISE A. Hemoglobin Concentration 

Picture
Picture
What is hemoglobin?Hemoglobin is the protein molecule in red blood cells that carries oxygen from the lungs to the body's tissues and returns carbon dioxide from the tissues back to the lungs.
Hemoglobin is made up of four protein molecules (globulin chains) that are connected together; two alpha-globulin chains and two beta-globulin chains. Each globulin chain contains an important iron-containing porphyrin compound called heme. Embedded within the heme compound is an iron atom that is vital in transporting oxygen and carbon dioxide in our blood. The iron contained in hemoglobin is also responsible for the red color of blood.​

Equipment • Placemat • Hemoglobinometer • Test strips • Lancet • Alcohol swab • Band Aid 

Protocol: 
  • 1. Set up your placemat and materials. Read through the entire set of instructions before you begin. 
  • 2. Use an alcohol swab to clean the area that you will lance. Allow the area to dry. 
  • 3. Lance your finger and discard the first drop of blood. 
  • 4. Quickly and completely fill test strip. Capillary action will easily fill the test strip. If you take too long, then it will coagulate. See the following figure for guidance.
  • 5. Clean the outside of the test strip with an alcohol swab making sure you do not touch the blood sample. Allow to dry. 
  • 6. Turn on the hemoglobinometer. Read the provided instructions card. 
  • 7. Insert the test strip and record your results. Wipe the machine with an alcohol swab after use. Allow to air dry. 
  • 8. CLEAN-UP: Test strips and lancets should go in the biohazard sharps waste. Alcohol swabs, used Band-Aids, and any other material that touched blood should go in the biohazard soft waste. Other clean waste should go in the regular trash.
A common method for measuring the hemoglobin content of blood makes use of an instrument known as a hemoglobinometer, which compares the colour of light passing through a hemolyzed blood sample with a standard colour. The results of the test are expressed as grams of hemoglobin per 100 ml of blood.
How to Use a Hemoglobinometer
A hemoglobinometer is an instrument used to determine the hemoglobin content of the blood by spectrophotometric measurement. Portable hemoglobinometers provide easy and convenient measurement, which is particularly useful in areas where no clinical laboratories are available.
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Blood Test Strips
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Lancet
Normal hemoglobin concentration varies for males and females:
o Males: 13 – 18 g/dL
o Females: 12 – 16 g/dL

● Calculate your Mean Corpuscular Hemoglobin Concentration.
o Mean corpuscular hemoglobin concentration (MCHC) in (%) = ( [hemoglobin] * 100% ) / hematocrit

Normal MCHC values: 32 – 36% hemoglobin / cell 

 Calculate your Mean Corpuscular Volume.
o Mean corpuscular volume (MCV) in (um3) = (Hematocrit * 10) / (RBC count)

● Normal MCV values: 76 – 100 um3
Lab Exercise B. Blood typing
Equipment • Placemat • Lancet • Alcohol swab • Band-Aid • 2 slides • 4 cover slips • ABO blood typing kit (A antibody, B antibody) • Rh blood typing kit (D antibody) • 3 Toothpicks • Wax pencils 
​
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PLAY THE BLOOD TYPING GAME!
Protocol: 
  • 1. Set up your placemat and materials. Read through the entire set of instructions before you begin. 
  • 2. Use an alcohol swab to clean the area that you will lance. Allow the area to dry. 
  • 3. Draw two circles on a slide and label A and B. Draw one circle on a slide and label Rh. See the figure for guidance.
  • 4. Add one drop of A antibody on the circle labeled A. 
  • 5. Add one drop of B antibody on the circle labeled B.
  • . Add one drop of D antibody on the circle labeled Rh. 
  • 7. Lance your finger and discard the first drop of blood. Place one drop in each circle on the slides. 
  • 8. Mix the blood and antibody using a clean toothpick. Use a clean toothpick for each circle/antibody. 
  • 9. Wait 1 minute. 
  • 10. Put a coverslip over each circle and look under the microscope. 
  • 11. Record any hemagglutination. Remember that hemagglutination is considered a positive result. 
  • 12. CLEAN-UP: Lancets and slides should go in the biohazard sharps waste. Alcohol swabs, used Band-Aids, and any other material that touched blood should go in the biohazard soft waste. Other clean waste should go in the regular trash.
• Blood typing
● Draw your results:
● What blood type are you? __________________________________ ● List the blood types could you accept during a blood transfusion:
● List the blood types could you not accept during a blood transfusion:
● Explain why a universal donor can donate to anyone but can only accept from one blood type.
Blood type
Type A
Type B
Type AB
Type O
Antigens Present
​ (on RBCs)
Type A Antigen
Type B Antigen
Type A and Type B Antigens
No Antigens
​(Universal Donor)
Antibodies Present
​(in blood plasma)
Type B Antibodies
Type A Antibodies
No Antibodies
(Universal Recipient)
Type A and Type B Antibodies
Exposing RBCs to Anti-A Antibody RESULTS
Agglutination - Anti A Antibody Binds to the Type A Antigen
No Agglutination
Agglutination - Anti A Antibody Binds to the Type A Antigen
No ​Agglutination
Exposing RBCs to Anti-B Antibody RESULTS
No Agglutination
Agglutination - Anti B Antibody Binds to the Type B Antigen
Agglutination - Anti A Antibody Binds to the Type A Antigen
​No Agglutination
CAN RECEIVE BLOOD TYPES
Blood Type A and Blood Type O
Blood Type B and Blood Type O
Blood Type A, Blood Type B and Blood Type O
Blood Type O
Rh Factor
Rh +
Rh -
​Antigens Present
​ (on RBCs)
Rh + Antigen
No Antigen
Antibodies Present
​(in blood plasma)
No Antibodies
Rh Antibodies
Exposing RBCs to Anti-Rh Antibody RESULTS
Agglutination - Anti Rh Antibody Binds to the Type Rh Antigen
No Agglutination
​CAN RECEIVE BLOOD TYPES
Blood Type Rh + and Blood Type Rh -
Blood Type Rh -
A patient can receive blood that has the same ABO antigens as theirs, plus O.
Rh+ can receive Rh+ or Rh-, while Rh- must receive Rh- blood.

Lab Exercise C. Hematocrit Level 

Hematocrit (Hct) Levels. This is the ratio of the volume of red cells to the volume of whole blood. Normal range for hematocrit is different between the sexes and is approximately 45% to 52% for men and 37% to 48% for women.

Equipment • Placemat • Hematocrit tube (Heparinized capillary tube) • Clay sealant • Hematocrit centrifuge • Hematocrit reader 

Protocol: 
  • 1. Set up your placemat and materials. Read through the entire set of instructions before you begin.
  • 2. Use an alcohol swab to clean the area that you will lance. Allow the area to dry. 
  • 3. Identify the side of the hematocrit tube that has the red ring around it. This side is the “clean” side of the hematocrit tube and this side will go into the clay sealant. BLOOD CAN ONLY TOUCH THE SIDE WITHOUT THE RED RING. 
  • 4. Lance your finger and discard the first drop of blood. 
  • 5. Quickly and completely fill the heparinized capillary tube with fresh blood (must fill 75% of the tube). Capillary action will easily fill the tube. If you take too long, then it will coagulate. See the following figure for guidance.
  • 6. Once you have filled the hematocrit tube, stick the “clean” side of the hematocrit tube in the clay sealant (do this at least two times). Blood will not run out of the hematocrit tube if sealed properly. 
  • 7. Clean the outside of the hematocrit tube with an alcohol swab making sure you do not touch the blood sample. Allow to dry.
  • 8. Place the hematocrit tube into the hematocrit centrifuge making sure that the clay sealant is facing outward. If placed incorrectly, then the blood will flow out of the hematocrit tube. Make note of the location of your hematocrit tube. 
  • 9. Properly close the hematocrit centrifuge and spin at high speed for 5 minutes. 
  • 10. Remove the hematocrit tube and use a hematocrit reader to read the hematocrit level. Your instructor will show you how to use the hematocrit reader. Record your results. 
  • 11. CLEAN-UP: Hematocrit tubes and lancets should go in the biohazard sharps waste. Alcohol swabs, used Band-Aids, and any other material that touched blood should go in the biohazard soft waste. Other clean waste should go in the regular trash.
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When heparinized blood (heparin is an anticoagulant) is centrifuged, the red blood cells become packed at the bottom of the tube, while the plasma is left at the top as a clear liquid. The ratio of the volume of packed red cells to the total blood volume is called the hematocrit.
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  • The hematocrit tube  after it was centrifuged will have plasma, buffy coat (buf) if visible, and hematocrit (Red Blood Cells), and a clay sealant.​
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● What is the purpose of using a hematocrit centrifuge? 

​Centrifuges apply centrifugal force to separate suspended particles from a liquid or to separate liquids of different densities. These liquids can include body fluids (e.g., blood, serum, urine), commercial reagents, or combinations of the two with other additives. By creating forces many times greater than gravity, centrifuges can greatly accelerate separations that occur naturally as a result of density differences. The microhematocrit centrifuge, a special-purpose version of a fixed-head unit, quickly attains speeds of 11,000 rpm and RCFs (relative centrifugal forces) of up to 15,000 g to spin microcapillary tube samples. These tubes require only small blood samples taken from a puncture site or from an anticoagulated venous blood specimen. 
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Lab Exercise D. RBC (erythrocyte) Count
***Student will only get to try this experiment one time.
Equipment • Placemat 
• Lancet • Band-Aid • Alcohol swab • Hemocytometer • Unopette reservoirs (small microcentrifuge tube with fluid) • Small capillary tube for unopette reservoir • Counter • Micropipette 

Protocol: 
  • 1. Set up your placemat and materials. Read through the entire set of instructions before you begin.
  • 2. Use an alcohol swab to clean the area that you will lance. Allow the area to dry. 
  • 3. Lance your finger and discard the first drop of blood.
  • 4. Quickly and completely fill the small capillary tube with fresh blood. Capillary action will easily fill the tube. If you take too long, then it will coagulate. 
  • 5. Immediately place the filled small capillary tube into the unopette reservoir and shake well to release the blood into solution. 
  • 6. Clean your hemocytometer with alcohol and lens paper only. Allow to air dry. Never use soap, alcohol swab, or a paper towel as it will scratch the surface of the slide. 
  • 7. Place a cover slip over the reflective surface of the hemocytometer. 
  • 8. Invert your unopette reservoir to resuspend the RBCs. 
  • 9. Use a micropipette to add 10μL of your RBC suspension into the V-shaped groove. Capillary action will move the suspension over the reflective surface. 
  • 10. Use a compound microscope to view the grid on the reflective surface of the hemocytometer. counting View the hemocytometer at the highest magnification that allows you to see an entire quadrant. Remember that the RBCs are not stained and therefore you should use high contrast by closing the iris diaphragm. 
  • 11. Using the Scanning Lens look for a cross (see the figure below) and focus on the middle of the cross. Put the pointer on the middle of the cross and then move to the Low Power Lens.
  • 12. Look for the 5x5 grid. You will be counting the RBC in squares found at each corner and the center square. In the figure below, we have shaded the square for you. Place the pointer on one of the required squares and then move to the High Power Lens to count the RBCs.
  • 13. Use a counter to count the RBCs in the 5 required quadrants (center, upper right, lower right, upper left, lower left) and report your results. You will count all of cells within the large quadrants on the hemocytometer. Count all of the cells within each quadrant except those on the far right edge and lower bottom edge. Cell that touch the middle line of the boundary on the right edge and lower edge will not be counted. See the figure below to learn how to count the RBCs; cells that are crossed out are not counted.
  • 14. CLEAN-UP: Unopette reservoirs, disposable pipet tips, cover slips, and lancets should go in the biohazard sharps waste. Alcohol swabs, used Band-Aids, and any other material that touched blood should go in the biohazard soft waste. Other clean waste should go in the regular trash. Rinse your hemocytometer with DI water and then with ethanol. Blot dry with lens paper. Allow to air dry.
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Counting
Observe the grid of the hemocytometer. Different areas are used for counting red blood cells and white blood cells. You will count the red cells that are located in the areas indicated in red.

Consider the following: The central grid of 25 squares is 1mm x 1mm in area and 0.10 mm deep, and holds 0.1ml of liquid. 

The dilution factor is 1:200. Convert the number of red blood cells that are counted in 5 squares to the number of red blood cells/µl. 
(N.B. 1 µl (microliter) = 1 cubic mm ).
Since only 5 out of the 25 squares (1:5) are counted, you must multiply your count by 5.
Since you have diluted your sample by 200 (1:200), you must also multiply your count by 200
to arrive at the original concentration in the body. You obtain a count which is contained in a volume of 0.1µl (25 squares). So you must also multiply by 10 to express the count per cubic mm.

​
Important note: To avoid counting the same cells twice, cells that are touching the lines at the tops and left sides of the squares are counted, but cells that are touching the bottoms and right sides of the squares are not counted.
 
Typical Counts for Female: 3.9 to 5.6 million/µl
Typical Counts for Male: 4.5 to 6.5 million/µl


RBC count for Square 1: ___________________________________ ● RBC count for Square 2: ___________________________________ ● RBC count for Square 3: ___________________________________ ● RBC count for Square 4: ___________________________________ ● RBC count for Square 5: ___________________________________ ● Total RBC count for Squares 1-5: ____________________________ ● Multiply the above number by 10,000: _________________________ ● Normal RBC counts vary for males and females:
o Males: 4,200, 000 – 6,900,000 μL/mm3
o Females: 3,900, 000 – 5,600,000 μL/mm3
​ ● Are you within normal range? _______________________________
Excessively low values of red blood cell count, hematocrit, or hemoglobin may be indicative of anemia (i.e. decreased oxygen carrying capacity of blood). There are many different causes of anemia (e.g. loss of blood through hemorrhage, bone marrow disease, iron deficiency, vitamin B12 deficiency, or folic acid deficiency, etc.) and some of those are characterized by typically very small or very large red blood cells or reduced hemoglobin concentration in each cell.
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Diagnosis of the type of anemia may be assisted by relating the measurements of red blood cell count, hematocrit and hemoglobin to derive the mean corpuscular volume (MCV) and the mean corpuscular hemoglobin concentration (MCHC).


Erythrocytes containing the normal amount of hemoglobin (normal MCHC) are called normochromic. When the MCHC is abnormally low they are called hypochromic, and when the MCHC is abnormally high, hyperchromic.

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Erythrocytes that have a normal size or volume (normal MCV) are called normocytic. When the MCV is high, they are called macrocytic. When the MCV is low, they are termed microcytic.

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