Lecture Outline 13 Chapter 13 Lecture Notes 13.1. The circulatory system consists of three types of blood vessels. Function to transfer blood away from the heart. Arteries are able to expand after each heartbeat to accommodate increased blood volume.
Arteries regulate blood pressure.
Function as site of exchange of nutrients and waste between blood and body cells. Heart External Structure a. Cone-shaped muscular organ. About size of a fist. Two thick-walled lower, stronger ventricles .