The Circulatory System

1. Blood Vessel Structure and Function

1.1. Arteries - carry blood away from the heart

1.1.1. Arterioles - smaller than arteries

1.1.1.1. capillaries

1.2. venous return

1.3. Arteries flow away from heart and Veins return blood to heart.

2. thought bubble

3. Heart

4. Blood Flow through Blood Vessels