![]() ![]() Capillaries are also connected to veins, so wastes from the cells can be transferred to the blood. Oxygen and food nutrients pass from these capillaries to the cells. Capillaries are so small that blood cells can only move through them one at a time. The only artery that picks up deoxygenated blood is the pulmonary artery, which runs between the heart and lungs.ĬapillariesThe arteries eventually divide down into the smallest blood vessel, the capillary. The largest artery is the aorta, which connects to the heart and picks up oxygenated blood from the left ventricle. Arteries divide like tree branches until they are slender. The blood starts its journey around the body once more.īlood vesselsBlood vessels have a range of different sizes and structures, depending on their role in the body.ĪrteriesOxygenated blood is pumped from the heart along arteries, which are muscular. It is pumped into the left lower chamber (ventricle) and then into the aorta (an artery). ![]() The left side of the heartThe oxygenated blood travels back to the heart, this time entering the left upper chamber (atrium). The blood is squeezed down into the right lower chamber (ventricle) and taken by an artery to the lungs where the carbon dioxide is replaced with oxygen. The right side of the heartThe right upper chamber (atrium) takes in deoxygenated blood that is loaded with carbon dioxide. The contractions of the chambers make the sound of heartbeats. The heart is actually a double pump made up of four chambers, with the flow of blood going in one direction due to the presence of the heart valves. It sits inside the chest, in front of the lungs and slightly to the left side. The heartThe heart pumps blood around the body.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |