capillaries
Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
The main function of respiration is the exchange of gases, namely oxygen and carbon dioxide.
The function of the avioli is to exchange gas and oxygen. In turn, it then turns it into carbon dioxide.
Assuming this refers to blood vessels, the answer is the capillaries.
Blood capillaries
The main fuction of blood vessels is to help the blood reach the arteries
They are small blood vessels that take deoxygenated blood to the heart. Gas exchange.
Capillaries are known as exchange vessels. Capillaries are the smallest of vessels and allow nutrients and waste to pass through blood and body.
The capillary is the smallest type of the vessels . it consists only of two epithelial cells. and its main function depends on its permeability . so , it is the main site for exchange of nutrition and gases. from the tissues to the circulation and from circulation to the tissues .
Gas exchange is a function of respiration not digestion.
These are the finer vessels that carry blood, providing oxygen and nutrients to the skin and other tissues.
through the blood vessels
Cappilaries
capillaries
The afferent arteriole.
veins