1. March 24-25, 2015

2. Types of Blood Vessels

3. Blood Vessel Tunics  All vessels except capillaries have three layers, or tunics  Capillaries have a single layer of epithelial cells

4. Comparison of blood vessels What are the differences? How do they relate to function? Veins also have valves and are flexible

5. Blood vessel micrograph What is a? What is b? How do you know? A B

6. How does blood return to the heart? Muscular pump Respiratory pump Describe the action of these pumps in 1-2 sentences

7. Capillary Bed  What is the difference between the vascular shunt and true capillaries?  What is the function of precapillary sphincters?

8. Closure Explain the statement: “All other blood vessels exist to service the capillaries” How does what we did today relate to our unit question?

9. Exit Ticket 1. Describe the structure of a capillary and explain how it facilitates it’s function. (2 pts) 2. Describe 2 differences in the structure of arteries and veins and explain how these differences facilitate their functions. (4 pts)