The capillaries
indirect respiration is a gaseous exchange that involves two phases: a. external respiration - exchange of gases between environment and tissues. b. internal respiration - exchange of gases between the tissues and body cells juiysiey ",
It is called wrapped tissues
concentration gradients, osmosis, and hydrostatic pressure
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
In the lungs - specifically, the alveoli.
Capillary Exchange is a biological term. This is where fluids, gasses, nutrients, and wastes are exchanged between the blood and body tissues by diffusion.
Gills
To permit material exchange between blood and tissues.
When the partial pressure between the alveoli and the blood, or between the blood and the tissues, is different - i.e. when a concentration gradient exists.
They can control gas exchange in the tissues. When they are constricted, there is almost complete no gas exchange. The blood just bypasses the tissues.
The capillary is the smallest of the blood vessels. It is the site of gas exchange between the blood and the tissues.