Answer:
Explanation:
These are arteries, which prevent the backflow of blood because the walls have little muscle to pump blood back to the heart.
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Answer:
Againg population that's the answer
Inhaling particles from a wildfire can cause respiratory irritation, shortness of breath, asthma, and lead to long-term problems such as heart disease. If carbon monoxide is in the air, it can be fatal.
Answer:
The missing options are:
a.lining the pharynx
b.lining the trachea
c.within the walls of the alveoli
d.You would find epithelial cells in all of the listed answer choices.
The correct answer is d. You would find epithelial cells in all of the listed answer choices.
Explanation:
Epithelial cells are in all the options mentioned above because they are the ones that form the tissue of the respiratory system, and that form a barrier between the exterior and the interior of the body as a mechanism of protection. They also are in the skin or the urinary system.
