Air sacs and alveoli have a high surface volume to ratio. This basically means that because of their structure / the abundance of them, they are easily able to exchange gases such as the absorption of oxygen.
Basically, the structure of them means there is lots of surface for gases to exchange through, making the process quicker and more efficient.
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The lungs are adapted for their function of gas exchange by having a large surface area provided by tiny air sacs called alveoli, where oxygen and carbon dioxide are exchanged with the blood. This large surface area allows for efficient diffusion of gases. Additionally, the lungs are highly vascularized, meaning they have an extensive network of blood vessels to transport gases between the lungs and the rest of the body.
The lungs adaptation to their function helps to maximize the amount of oxygen that is gained. They also are supplied with blood capillaries.
to move when the lungs expand so the lungs dont get crushed
Because lungs are not adapted to absorb oxygen from the water.
Lungs are adapted to their job of exchanging oxygen and carbon dioxide through a large surface area with millions of tiny air sacs called alveoli, which allows for efficient gas exchange. The walls of the alveoli are thin and surrounded by a network of small blood vessels, enabling oxygen to diffuse into the blood and carbon dioxide to diffuse out. The lungs are elastic and can expand and contract to support breathing.
Allow air to pass from trachea to lungs
Human lungs provide an exchange of gases. The closest thing to it in cells is the cellular membrane, which allows some gas to pass into the cell, and others, to go out.