1. Blood
Chapter 18

3. Composition of Blood Plasma < 55% Erythrocytes < 45%
Leukocytes and Platelets < 1%

4. Functions of Blood Deliver Oxygen and Nutrients
Transport Metabolic Waste
Transport Hormones
Maintain Body Temperature
Maintain Body pH
Maintain fluid volume in circulatory system

5. Functions of Blood Prevents Blood Loss (platelets)
Prevents Infection (Antibodies)

6. Composition and Function of Blood
Plasma
Straw colored, sticky

7. Composition and Function of Blood

8. Composition and Function of Blood
Erythrocytes – Red blood cells (RBCs)
Biconcave discs
No nucleus

9. Composition and Function of Blood
Made up of Hemoglobin and Water and Fibrous Protein, Spectrin, which allows for shape change

10. Composition and Function of Blood
Job is to pick up and deliver oxygen/nutrients to body cells
Also transport Carbon Dioxide back to Lungs

11. Composition & Function of Blood
A single RBC contains about 250 million hemoglobin molecules
Each cell carries about 1 billion molecules of Oxygen

12. Composition & Function of Blood
Oxyhemoglobin = Heme + O2
Deoxyhemoglobin = Heme - O2
Carbaminohemoglobin = Heme + CO2

13. Composition & Function of Blood
RBCs life span is days

15. Composition & Function of Blood
Leukocytes (WBC) include:
Granular – Neutrophils; eat bacteria
Eosinophils; kill parasitic worms
Basophils; release histamines

16. Composition & Function of Blood
Agranular – Lymphocytes; immune attack
Monocytes (MACs); phagocytosis

17. Composition & Function of Blood
Diapedesis – Ability of WBCs to slip through blood vessels

18. Composition & Function of Blood
Platelets – Blood Clotting
Large shaped cells
Also called Thrombocytes

19. Blood Types A Blood – Anti-B B Blood – Anti-A AB Blood – None
O – Anti-A and B

21. Blood Types Rh Factors – 8 Different
Most common, D, occurs in 85 % of Americans (+)
See pages 649
Coagulation – thickening
Agglutination - clumping