The average resting heart rate for a human is around 80 beats per minute ... This short film explains how the heart and circulatory system work, taking a close look at the four chambers, two ...

Your heart's will to beat ... 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.

Veins between two capillary networks are portal systems. Closed circulatory system, but fluid constituents of blood leak out of capillaries and return to the heart by the second component of the ...

The human heart beats 60-100 times a minute, without you needing to pay any attention to it. Heart function is controlled by the brain’s autonomic nervous system (the parasympathetic and ...