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 ...

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.

PRESENTER:'Ella has P.E. today, and her circulatory system is going to have some exceptional ... The average resting heart rate for a human is around 80 beats per minute, but everyone is different ...