With a scapel, slice open the distal portion of the ileum and flush out the inner surface with water. feel the inner surface with your fingertip. how does it feel?

it feels soft.

Explanation:

The ILEUM is the third and final part of the small intestine, that is, it is the final section of the small intestine. The importance of ILEUM include; the absorption of bile salts, the absorbtion of vitamin B12 and other digestion products not absorbed by the jejunum.

The ileum has more fat inside the mesentery than the jejunum. Also, ILEUM has a large surface area absorption of digestion products and also, for enzyme molecules adsorption.

The wall of ileum is made up of folds, each folds has many tiny finger-like projections known as villi. The villi in turn contains a lot of capillaries that take the amino acids and glucose digested to the liver.

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.