When blood passes by body cells what do the do?

Body cells take in oxygen and nutrients from the blood and release carbon dioxide and other waste products.

Blood is a fluid that circulates throughout the body, carrying oxygen, nutrients, and waste products to and from cells. When blood passes by body cells, the cells use the oxygen and nutrients in the blood to produce energy and carry out other essential functions. The cells also release carbon dioxide and other waste products into the blood, which are then transported to the lungs and kidneys for elimination from the body.

The exchange of oxygen and carbon dioxide between blood and body cells occurs in the capillaries, which are tiny blood vessels that connect arteries to veins. The walls of the capillaries are very thin, allowing for the easy diffusion of oxygen and carbon dioxide between the blood and the surrounding tissues.

The process of oxygen and carbon dioxide exchange is essential for the survival of body cells. Without oxygen, cells would not be able to produce energy and would eventually die. Without the removal of carbon dioxide, cells would become acidic and also eventually die.

The circulation of blood throughout the body is a continuous process that ensures that all cells have the oxygen and nutrients they need to function properly.