The cirlulatory system consists of the heart and  blood vessels (arteries, veins and capillaries). The heart propels the circulation of the blood, which serves as a “transportation system” to transfer oxygen, fuel, nutrients, waste products, immune cells and signalling molecules (i.e.  hormones) from one part of the body to another. Paths of blood circulation within the human body can be divided into two circuits: the pulmonary circuit which pumps blood to the lungs to receive  oxygen and leave carbon dioxide, and the systemic circuit, which carries blood from the heart off to the rest of the body. The blood consists of fluid that carries cells in the circulation, including some that move from tissue to blood vessels and back, as well as the spleen and bone marrow. 

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Wei Wei Ning

About Wei Wei Ning

I am Wei Wei Ning, an author and a blogger of https://www.lifestylemedicine4u.com. I am a Certified Transition Lifestyle Coach, Holistic Functional Nutrition Counselor, Digital Entreprenuer and Digital Health & Lifestyle Educator.

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