The human circulatory and respiratory systems prevent the entry of external pollutants while supplying oxygen to cells via the bloodstream and expelling unnecessary carbon dioxide.

The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The ...

The respiratory system is responsible for the exchange of carbon dioxide and oxygen in the human body. This system also helps remove metabolic waste products and keep pH levels in check.

The respiratory system is made up of organs and other parts of the body involved in breathing when you exchange oxygen and carbon dioxide.

Reference Article: Facts about the human circulatory system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The circulatory system, also ...

The Circulatory System is the system of organs in the human beings and other animals which is responsible for transport of materials inside the body.

Similar to the human circulatory system or lungs, the fruit fly's tracheal system consists of a network of tubes. During the embryonic development of these insects, this network of tubes is filled ...

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.

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