Blood contains oxygen and other nutrients which your body needs to survive.
The heart gets messages from the body that tell it when to pump more or less blood depending on a person's needs. Boundless Biology: It beats between 60 and 100 times per minute, typically.
The pancreas produces insulin , which controls the use of sugar.
Two valves also separate the ventricles from the large blood vessels that carry blood leaving the heart:. Pulmonary Circulation. The main arteries which branch off the aorta and take blood to specific parts of the body are:.
The left and right side each have two chambers, a top chamber and a bottom chamber. The body is then able to use the oxygen in the blood to carry out its normal functions.
Red blood cells, white blood cells, and platelets Plasma the liquid part of blood Bone marrow where blood cells are produced Spleen Thymus. Medically reviewed by Healthline's Medical Network on February 4, 2015. The pericardium is a fibrous covering which wraps around the whole heart.
The descending aorta sends blood to the lower thorax, the abdomen, the pelvis, and the lower extremities. The pulmonary artery carries blood lacking oxygen to the lungs, then back to the heart.
A cell typically lives 120 days, so bones constantly create new ones. Murmurs may indicate a problem with the heart valves, but many types of murmur are no cause for concern. At the level of capillaries, cells send their carbon dioxide and other wastes into the blood, and receive the blood's oxygen.
From here, the electrical signal travels through the right and left ventricles, making them contract. Systemic Circulation.
When the blood reaches the lungs, it releases carbon dioxide, a waste product, and picks up more oxygen. The endocrine system consists of various glands that produce transmitters called hormones. These roadways travel in one direction only, to keep things going where they should.