1. 5 November 2009 Begin Ch 12 Cardiovascular Physiology
6 sections p
2 CV labs: 1 Frog heart, 1 Human EKG and Blood Pressure

2. S 1 S

3. Circulatory System Circulates
Nutrients: glucose, amino acids, fatty acids, ketones, etc
Wastes:
Hormones: bound & free
Gases: CO2 and O2
Formed Elements: Cells and Cell Fragments
Erythrocytes, Leukocytes, Thrombocytes = Platelets
Other roles of the Cardiovascular System
Thermoregulation
Blood Clotting
Reproduction (ex: penile erection)

4. Entering and Exiting the blood
S 3
Blood volume ~ 5 liters
Figure 12.01
Serum = plasma – clotting factors
Entering and Exiting the blood
Components……
Discontinuous capillaries in bone marrow, spleen, & liver permit erythrocytes to enter and exit blood.
The Scoop on Tissie
Formed elements
Hct = percentage of blood volume occupied by RBCs
Anemia
Blood doping & erythropoietin (hormone that stimulates erythrocyte production in bone marrow) to increase hematocrit

5. Arteries..away from heart Veins..return to heart
Fig
When left heart can’t pump all the blood it receives from pulmonary circuit (due to high aortic pressure and/or damage to left ventricle) blood accumulates in pulmonary circuit. This is congestive heart failure. Symptom: shortness of breath.
S 4
Arteries..away from heart Veins..return to heart
Regional blood flow determined by arteries and arterioles.
12.02.jpg
Resting Cardiac Output = 5L/min for each side!

6. CO = 5L/min for each circuit
Figure 12.04
S 5
CO = 5L/min for each circuit
Up to 35 L/min in strenuous exercise

7. What’s missing? Microcirculation Exchange Vessels S 6
Pulmonary circuit
CO = 5 liters/min
CO = 5 liters/min
Systemic Circuit
Resistance Vessels
Microcirculation
Exchange Vessels
Capacitance vessels