1. Circulatory System Azami PHD

3. Blood

4. Components of blood –Total volume of blood – 5 to 6 liters –Components Plasma 55-60 % Blood cells 40-45 % –RBC –WBC –Platelets produced in the bone marrow

5. Blood cells

6. R.B.C. (Red blood cells) –Colour of blood due to RBC –4 to 5 millions / c.c. –Hemoglobin carry 90% Oxygen –Dumbbell shaped cells with no nucleus

7. W.B.C. (White blood cells) –White colored –6000 to 9000 / c.c. –Kills the bacteria (protective role) –No specific shape, with central nucleus

8. Platelets –Helps in clotting of blood –Circular shape

9. Plasma –90 to 92 % water –8 to 10 % dissolved organic & inorganic matter (proteins, glucose, salts & hormones)

10. Blood vessels 1.Heart 2.Elastic arteries (e.g., aorta and pulmonary arteries) 3. Muscular arteries (remaining named arteries) 4. Small arteries and arterioles 5. Capillaries 6. Venules and small veins 7. Medium veins (most named veins) 8. Large veins (e.g., venae cavae return blood to the heart)

13. Heart 3 layers: epicardium, myocardium and endocardium

14. Body cavities Figure 1.9

19. Middle. Mediastinum

25. Heart Covering Pericardial physiology –Protects and anchors heart –Prevents overfilling Figure 17.2

26. External Heart: Anterior View Figure 17.4b

27. External Heart: Posterior View Figure 17.4d

29. External Heart: Anterior View Figure 17.4b

31. External Heart: Anterior View Figure 17.4b

33. Heart Valves Figure 17.9

36. Heart Valves Figure 17.10

38. External Heart: Posterior View Figure 17.4d

42. Pathway of Blood through the Heart and Lungs Figure 17.5

43. Relative thickness of muscular walls?