1. Anatomy and Physiology, Sixth Edition
Rod R. Seeley Idaho State University
Trent D. Stephens Idaho State University
Philip Tate Phoenix College
Chapter 19
Lecture Outline*
*See PowerPoint Image Slides for all figures and tables pre-inserted into PowerPoint without notes.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

2. Cardiovascular System
Chapter 19
Cardiovascular System
Blood

3. Functions of Blood Transport of: Regulation of pH and osmosis
Gases, nutrients, waste products
Processed molecules
Regulatory molecules
Regulation of pH and osmosis
Maintenance of body temperature
Protection against foreign substances
Clot formation

4. Composition of Blood

5. Plasma Liquid part of blood
Pale yellow made up of 91% water, 9% other
Colloid: Liquid containing suspended substances that don’t settle out
Albumin: Important in regulation of water movement between tissues and blood
Globulins: Immune system or transport molecules
Fibrinogen: Responsible for formation of blood clots

6. Formed Elements Red blood cells (erythrocytes)
White blood cells (leukocytes)
Granulocytes
Neutrophils
Eosinophils
Basophils
Agranulocytes
Lymphocytes
Monocytes
Platelets (thrombocytes)

7. Production of Formed Elements
Hematopoiesis or hemopoiesis: Process of blood cell production
Stem cells: All formed elements derived from single population
Proerythroblasts: Develop into red blood cells
Myeloblasts: Develop into basophils, neutrophils, eosinophils
Lymphoblasts: Develop into lymphocytes
Monoblasts: Develop into monocytes
Megakaryoblasts: Develop into platelets

8. Hematopoiesis

9. Erythrocytes Structure Components Function Biconcave, anucleate
Hemoglobin
Lipids, ATP, carbonic anhydrase
Function
Transport oxygen from lungs to tissues and carbon dioxide from tissues to lungs

10. Hemoglobin Consists of:
4 globin molecules: Transport carbon dioxide (carbonic anhydrase involved), nitric oxide
4 heme molecules: Transport oxygen
Iron is required for oxygen transport

11. Erythropoiesis Production of red blood cells
Stem cells proerythroblasts early erythroblasts intermediate late reticulocytes
Erythropoietin: Hormone to stimulate RBC production

12. Hemoglobin Breakdown

13. Leukocytes
Types
Neutrophils: Small phagocytic cells
Eosinophils: Reduce inflammation
Basophils: Release histamine and increase inflammatory response
Lymphocytes: Immunity
Monocytes: Become macrophages
Protect body against microorganisms and remove dead cells and debris
Movements
Ameboid
Diapedesis
Chemotaxis

14. Leukocytes

15. Thrombocytes
Cell fragments pinched off from megakaryocytes in red bone marrow
Important in preventing blood loss
Platelet plugs
Promoting formation and contraction of clots

16. Hemostasis Arrest of bleeding Events preventing excessive blood loss
Vascular spasm: Vasoconstriction of damaged blood vessels
Platelet plug formation
Coagulation or blood clotting

17. Platelet Plug Formation

18. Coagulation Stages Pathways Activation of prothrombinase
Conversion of prothrombin to thrombin
Conversion of fibrinogen to fibrin
Pathways
Extrinsic
Intrinsic

19. Clot Formation

20. Fibrinolysis
Clot dissolved by activity of plasmin, an enzyme which hydrolyzes fibrin

21. Blood Grouping
Determined by antigens (agglutinogens) on surface of RBCs
Antibodies (agglutinins) can bind to RBC antigens, resulting in agglutination (clumping) or hemolysis (rupture) of RBCs
Groups
ABO and Rh

22. ABO Blood Groups

23. Agglutination Reaction

24. Rh Blood Group First studied in rhesus monkeys Types
Rh positive: Have these antigens present on surface of RBCs
Rh negative: Do not have these antigens present
Hemolytic disease of the newborn (HDN)
Mother produces anti-Rh antibodies that cross placenta and cause agglutination and hemolysis of fetal RBCs

25. Erythroblastosis Fetalis

26. Diagnostic Blood Tests
Type and crossmatch
Complete blood count
Red blood count
Hemoglobin measurement
Hematocrit measurement
White blood count
Differential white blood count
Clotting

27. Blood Disorders Erythrocytosis: RBC overabundance
Anemia: Deficiency of hemoglobin
Iron-deficiency
Pernicious
Hemorrhagic
Hemolytic
Sickle-cell
Hemophilia
Thrombocytopenia
Leukemia
Septicemia
Malaria
Infectious mononucleosis
Hepatitis