they are very similar, both have:
thin walls through which particles can pass
consist of tiny projections
occurs in huge numbers
Alveoli
alveoli
Lungs
the alveoli
the alveoli
alveoli
aleovi
no
They are connected at the alveoli.
An exchange surface is in direct contact with the external environment in the respiratory and digestive systems. In the respiratory system, the alveoli in the lungs act as exchange surfaces for oxygen and carbon dioxide. In the digestive system, the lining of the small intestine serves as an exchange surface for the absorption of nutrients.
The alveoli is the division of the respiratory system where gas exchange with the blood occurs. Oxygen from the inhaled air diffuses into the blood in the capillaries surrounding the alveoli, while carbon dioxide diffuses from the blood into the alveoli to be exhaled.
'alveoli'