Answer :
Final answer:
The stomach muscles use peristalsis, proper cooking eliminates parasites in meat, and the pyloric sphincter regulates food passage.
Explanation:
Explanation:
Peristalsis is the rhythmic contraction and relaxation of muscles that pushes food through the digestive tract, including in the esophagus where it moves food towards the stomach. Gravity also aids in moving food down the esophagus, so when a person is upside down, gravity still assists in the process.
Meat from the pig containing parasites such as Taenia solium must undergo proper cooking to temperatures that will kill the parasites. Cooking the meat thoroughly ensures that any potential parasites are destroyed, making it safe for consumption.
The absence of the pyloric sphincter at the end of the stomach would result in food not being properly regulated in its passage from the stomach to the small intestine. This could lead to issues like reflux or improper digestion.
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