The openings are called stomata.
The stomata are openings in plant leaves through which gasses pass in and out. During the day carbon dioxide passes from the air through the stomata to the leaves and oxygen, produced by the leaf, passes back out through them. At night plants yield up small amounts of carbon dioxide through the stomata.
As with other plants, leaves are where the tree carries out photosynthesis to produce food. Leaves are also used to regulate the plant's temperature through water evaporation and exchange various gasses (oxygen, carbon dioxide, etc) needed/created by different internal processes.
Coke leaves the body in 72 hours.
yes
sound waves travel through best through solids because they are more dense, then liquids, and finally they travel the worst through gasses.
Liquids can through evaporation, and solids can through combustion.
Through chemical reactions, yes.
gasses
A bullet leaves a gun barrel because it is forced out by the pressure of burning gasses.
Longitudinal (also know as compression) waves travel more slowly through gasses than solids.
Arteries usually carry gasses such as oxygen throughout the blood. The gasses are then diffused through capillary beds to be used as nutrients by tissues in the body.
no