Transport of material in human being
dr fawziy 8 lecture 20/2/2013
Chapter 15 Cardiovascular System. Organs Heart - begins beating in the 4 th week of development. –Pumps 7,000 liters of blood each day. –Contracts 2.5.
The Circulatory System
May 2, 2013 Warm-Up: Use 10 min. for quiet study. You abuse it, you LOSE it!
Circulation and Respiration. II. Circulatory systems A. Circulatory system basics 1. Fluid — blood 2. Channels — vessels 3. A pump — the heart.
Circulation and Respiration
