ANATOMY

Detailed explanation-1: -The duodenum is the first segment of the small intestine. It’s largely responsible for the continuous breaking-down process. The jejunum and ileum lower in the intestine are mainly responsible for the absorption of nutrients into the bloodstream.

Detailed explanation-2: -The small intestine is a hollow tube that runs from the stomach to the large intestine (colon).

Detailed explanation-3: -The walls of the small intestine absorb water and the digested nutrients into your bloodstream. As peristalsis continues, the waste products of the digestive process move into the large intestine.

Detailed explanation-4: -Hollow gut is gastrovascular cavity opening. Ther is no difference between gastrovascular cavity and hollow gut. The gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Cnidaria (including jellyfish and corals) and Platyhelminthes(flatworms).

Detailed explanation-5: -Small intestine. The walls of the small intestine absorb the digested nutrients into the bloodstream.