Answer:
The alveoli are sacks coated on their inner wall by white and sticky liquid, they can be more than a millimeter in diameter and surface active agent. In them there is the exchange of gases between O2 and CO2.
They are evaginations of the epithelium of the air ducts with a single opening for the gases to exit and enter, controlled by the action of a smooth muscle sphincter. Its walls, called alveolar septa, provide a large increase in the exchange surface.
A related or common origin or property of an element in the chemical bond.
<span>I believe the answers are...
1. Stomata.
2. C</span><span>hloroplast
Hope this helps!</span>
Answer: A.
Insects fly to the flower for pollen and nectar