Circulatory system is the first organ system to become functional during development. Development of heart: On each side of embryo, an aorta forms ventrally and swings dorsally. The paired aortae in ...

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 ...

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.