The heart is a muscular organ that pumps blood around your circulatory system. The circulatory system is the heart and all the blood vessels in the body which carry cells and substances to all its ...

Locate each of the paired and unpaired branches from the dorsal aorta, using Figure 5.4, pages 58 - 60. Keep function and integration of circulatory system in mind as you locate organs.

That means that the vans are very busy indeed, all the time. So it's a good job we've got the circulatory system to transport nutrients, water and oxygen to the entire body. Your circulatory ...