question archive The purpose of alveoli is to allow fast and efficient gas exchange between the blood and the lungs
Subject:PsychologyPrice: Bought3
The purpose of alveoli is to allow fast and efficient gas exchange between the blood and the lungs.
1)Alveoli are very tiny in size. This increases their surface area for gas exchange. So more amount of gases can be exchanged in a given amount of time.
2)They are extensively surrounded by blood vessels(as you can see below). This means more air can be exchanged in a given amount of time.