The circulatory system in the normal human body (as in all vertebrates and some other select group of species) can be considered as a closed system, meaning that the blood never leaves the system of ...

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 ...

Researchers hit ‘major milestone’ in mapping cells of the human body - Experts have profiled more than 100 million cells from ...