Blood Capillaries

Blood capillaries are tiny, thin-walled blood vessels that connect arteries and veins in the body. They are crucial for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Their small size allows them to penetrate nearly all tissues, providing a direct route for substances to move in and out of the bloodstream. The walls of capillaries are just one cell thick, facilitating efficient diffusion. This intricate network of capillaries ensures that every cell in the body receives the oxygen and nutrients it needs to function properly while removing waste products.