2) For the absorption of the food, the intestines play a large role. The epithelum cell would help the absorption of food.
3) Circular Y
4) The mucus enables food to pass through with great ease.
5) The flow of blood through the esophagus is performed as energy when the blood flows through. Blood flow is very important in the human body as it provides gas exchange through the body as well.
6) The action of swallowing food is enabled with this esophagus.