So it's a good job we've got the circulatory system to transport nutrients, water and oxygen to the entire body. Your circulatory system is made up of three parts: the heart, blood vessels and the ...

This short film offers a look at respiration and a tour around the circulatory system and digestive system in the human body, through blood vessels and into mitochondria. There is a detailed ...

Not a highly efficient system, but has some ability to shunt blood to regions of the body where increased demand for oxygen is necessary Changes from elasmobranch -> lungfish, with evolution of ...

Microgravity also affects muscles and bones. Without the constant pull of gravity, muscles don’t have to work as hard, leading to muscle loss. Similarly, bones begin to lose density because they ...