The circulatory system consists of one heart, five liters of blood, and approximately 96,000 kilometers of blood vessels, responsible for transporting nutrients and waste throughout the body.

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 ...

PRESENTER:'Ella has P.E. today, and her circulatory system is going to have ... Biological processes of the human body. You could recreate the blood cycle / circulation by using red balloons ...