B. The amount of waste would build up and the toxins produced would harm the animals and humans
Fat is used as a form of energy when the body really needs it. where as an enzyme is used to speed up a reaction in the body or might be needed to start a reaction in a body.
<span>Red blood cells do not contain a nucleus because their purpose is to carry oxygen around the body. Due to the fact these cells do not have a nucleus, their capacity to carry this oxygen is increased greatly.</span>
Answer:
A. True
Explanation:
There are two sites where exchange of gases takes place, one is the exchange of gases between alveoli and blood and the second is exchange of gases between blood and tissue. In this question we are discussing about the about the diffusion of CO2 from blood to the alveoli for exhalation. CO2 must cross the diffusion membrane.
Diffusion membrane: The alveolar wall is thin and has rich network of capillaries. Due to this network, alveolar wall looks like a sheet of flowing blood and is called the diffusion membrane or alveolar-capillary membrane.This diffusion membrane is made up of three layers:
a. The thin squamous epithelium of alveoli
b. Endothelial lining of blood capillaries
c. a fused basement membrane between epithelium of alveoli and endothelium of capillaries.
All these three layers make the total thickness of about 0.2 mm.
Lysosomes are responsible for breaking down subtances in the cell.
That is intracellur digestion.
