What does blood do when it is pumped through the body?

Answer 1

After being oxygenated in the lungs, the blood enters the left atrium via the pulmonary veins. The left ventricle pumps the oxygenated blood to the rest of the body via the aorta. Blood cells carry oxygen, and the liquid portion of the blood, called plasma, carries the nutrients needed by the cells to perform their life functions. As oxygen enters the body cells, carbon dioxide, as a waste product from cellular respiration, diffuses into the blood, which returns to the right atrium of the heart via the superior and and inferior vena cavae, and is pumped to the lungs to be oxygenated via the right ventricle. As blood travels through the body, nutrients from the plasma enter the cells, and cell waste products enter the plasma. The liver and the kidneys cleanse the plasma portion of the blood, and nutrients are replenished via the small intestine. The plasma portion of the blood also carries hormones throughout the body, which are secreted by endocrine glands into the blood.