Capillaries are the largest of all blood vessels.
3 answers
I'm sorry, but that statement is incorrect. Capillaries are actually the smallest blood vessels in the human body. They have a very narrow diameter, allowing for the exchange of oxygen, nutrients, and waste products between the blood and surrounding tissues. Arteries and veins are larger blood vessels that transport blood throughout the body.
The exchange of oxygen and carbon dioxide takes place through the capillary wall.
Yes, you are correct. The exchange of oxygen and carbon dioxide between the bloodstream and the surrounding tissues occurs through the thin walls of capillaries. Oxygen from the blood diffuses into the tissues, while carbon dioxide produced by cellular metabolism diffuses from the tissues into the bloodstream, allowing for gas exchange. This exchange is facilitated by the small size and permeable walls of capillaries.
1 answer