<span>Lungs take in air, and diffuse (absorb) air into the capillaries of the blood. However, this process is two steps, one for inhalation and one for exhalation. Diffusion takes place in both processes, and serves different purposes. One is to absorb oxygen, the other is to rid co2.</span>
The mechanical and chemical receptors that control digestive activity are located in the walls of the tract organs.
Thallus<span> (plural: </span>thalli<span>), from Latinized Greek θαλλός (thallos), meaning "a green shoot" or "twig," is the undifferentiated vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria.</span>
From my notes
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1.mature shark
2. eggs
3. pups
4. new born shark
5. immature shark
then it goes on and on
Answer:Mostly in Africa but can also be found in Asia, Europe, and Antarctica.
Explanation:
