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belka [17]
2 years ago
9

Why do fish have gills​

Biology
1 answer:
Marta_Voda [28]2 years ago
4 0

Answer: Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. ... As the fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.

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this part of the stomach contains thick muscle to mix the food and move the food into the duodenum. it is called _____.
Alla [95]

Answer:

Pylorus

Explanation:

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The pylorus structure of the stomach is composed of thick muscles which help to mix or agitating the food in the stomach and controls the movement of the food to the duodenum which is the first part of the small intestine. The movement is controlled by the ring of muscles in the pylorus called pyloric sphincter.

Thus, Pylorus is the correct answer.

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2 years ago
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3 years ago
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