health of human being

THE CIRCULATORY SYSTEM OF HUMAN BEIOG
The blood vessels and heart from the circulatory system, pumping blood through their complete circuit and caring oxygen to the organs and tissues of the body. The heart pumps oxygen to reach blood through the body, distributing it through arteries and capillaries and supplying oxygen and nutrients vital to the functioning of the internal organs and tissues. After exchanging gases with surrounding tissues, the blood now oxygen depleted and laden carbon dioxide returns to the heart through the veins. This is known as systemic circulation. The another one is pulmonary circulation, transfer blood returning to the heart, along the pulmonary trunk and arteries to the lungs for oxygen and elimination of carbon dioxide. This renewed blood is returning to the systemic circulation, ready for another circuit of the body.

Heart
The heart is divided into four chambers. The left and right atria and the left and right ventricle. It pumps blood out from the left and right ventricles,and collects returned blood into it's left and right atria.

Blood
Blood is a suspension of red and white blood cells, platelets, protein and chemical in a fluid called plasma. Blood caries oxygen and essential nutrients from the lungs and digestive track to another parts of the body and caries waste products to organs such as the kidneys and lungs for elimination.The red blood cells carry oxygen to the body tissues, exchanging oxygen for carbon dioxide, which they takes to the lungs. The white blood cells play a role in the immune system and platelets are involved in the clotting process.