What are the two parts of small intestine in a frog?

The small intestine in a frog consists of two main sections: the duodenum and the ileum. Here is a brief description of each:

Duodenum: The duodenum is the first part of the small intestine. It is relatively short and connects directly to the stomach. The duodenum is where most of the chemical digestion of food occurs. Here, enzymes produced by the pancreas and the liver help to break down carbohydrates, proteins, and fats into smaller molecules that can be more easily absorbed by the body. The duodenum is also responsible for neutralizing the acidic contents coming from the stomach before they enter the rest of the small intestine.

Ileum: The ileum is the longer section of the small intestine and is located after the duodenum. The primary function of the ileum is to absorb the products of digestion. Here, nutrients such as amino acids, sugars, and vitamins are actively transported into the bloodstream. The ileum has specialized structures called villi and microvilli, which are microscopic finger-like projections on the surface of its lining that increase the surface area for absorption. The ileum is also responsible for absorbing water, bile salts, and other waste products.