BLOOD VESSELSMarch 24-25, 2015

Types of Blood Vessels

Blood Vessel Tunics All vessels except capillaries have three layers,

or tunics Capillaries have a single layer of epithelial cells

Comparison of blood vesselsWhat are the differences?

How do they relate to function?

Veins also have valves and are flexible

Blood vessel micrograph

What is a?

What is b?

How do you know?

A

B

How does blood return to the heart?

Muscular pump Respiratory pump

Describe the action of these pumps in 1-2 sentences

Capillary Bed What is the

difference between the vascular shunt and true capillaries?

  What is the

function of precapillary sphincters?

Closure

Explain the statement:

“All other blood vessels exist to service the capillaries”

How does what we did today relate to our unit question?

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)