the alveolus
OTHER ANSWER:
The surface area is kept moist to allow the oxygen and the carbon dioxide to pass trough
and large surface area is availeble.
By Fla97
Answer2:
The walls of the alveoli are adapted for efficient gas exchange in the following ways:
(i.)Large surface area. The total surface area of all the alveoli in both the lungs is over 100m2.
(ii.)Thin Walls. Alveolar walls are composed of a single layer of cells called epithelium. The surrounding capillary walls are also one cell thick. So gases need to diffuse only across this small distance to get into the blood.
(iii.)Moist Surface. Special cells in the wall of the alveoli produce a watery fluid so oxygen can dissolve, then diffuse into the blood cells of the capillary.
(iv.)The vast network of capillaries surrounding the alveolus supply blood to continuously carry the oxygen away from, and carbon dioxide to, the alveoli. In red blood cells, the presence of a respiratory pigment called hemoglobin, which combines with oxygen, increase the oxygen carrying ability of blood. The continual removal of oxygen keeps oxygen levels low in the capillaries. This favors rapid diffusion of oxygen from alveolus to blood as a steep diffusion gradient is mantained.
Note: adaptations (i) to (iv) are structural adaptations
(v.)Ventilation of lungs. The constant movement of air in and out of lungs maintains an efficient diffusion gradient for exchange of oxygen and carbon dioxide which takes place between the air and blood capillaries surrounding the alveoli lungs.
well what makes it well suited is that how a dogs adapted since they are fast learners what you teach them will make them well adapted.
yes, as well as a hollow bone structure
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well according to the mians it makes sense because then the earth is not but will be adapted to Kenya.
Well, frogs are amphibians that are not fully adapted to live on land, but they can survive for a little while on land. Although they have lungs, they can use their skin for oxygen/carbon dioxide exchange as well. If they are in the water, they use their skin to breath. If they're on land they use their lungs to breath. They can't be out of the water for too long or they'll literally "dry up." God bless!
Well, wolves ( all mammals ) use their lungs. Just like humans. Where as fish use gills!
Lungs well aerated
They breathe through lungs while on land,and by their skin while in water Through their skin.
well not. but giving and taking gifts makes the Christmas happy event
in an unchanging environment, selection in a well adapted population is?