Answer: Sphincter muscles
Explanation:
The circular rings of smooth muscles, that can contract to regulate the movement of the smooth muscles that can contract to regulate the movement of food through the gastrointestinal tract are known as sphincter muscles.
These two layers are outer layer and inner layer. The outer layer is longitudinal and the inner layer is circular. They contract rhythmically to squeeze food.
This type of mutation would be called a deletion
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Answer:
cell war
cell war and get rid of harm object
The answer to this question is soften tooth enamel becuase your teeth fall out