Describe how structure fit function for the small intestine?

Question

Describe how structure fit function for the small intestine?

Answer 1

The lining of the small intestine has a surface area of 600m2 , about the size of a baseball diamond. Large folds are decorated with fingerlike projections called villi, and each of the epithelial cells has many microscopic appendages called microvilli. The nutrients, except fat, are absorbed into the capillaries, while the fat enters the lacteal. Only 2 single layers of epithelial cells separate the lumen from the bodies blood supply. In the center of the villus is a tiny lymphatic vessel called the lacteal. Fatty substances enter the lacteal, along with other materials too large to enter the capillaries. This material is dumped into the blood near the left shoulder (thoracic duct). Most of the nutrients are pumped against a concentration gradient by epithelial membranes. Sodium is pumped out of the cells into the lumen and fuels the entry of the nutrients into the cells and blood vessels by passively flowing back into the cells with the nutrients. All the contents of the blood enter the liver via the Hepatic portal vein. The liver regulates the contents of the blood.

Answer 2

Well the small intestine is made to absorb nutrients, and it needs time to absorb them, so the structure of the small intestine (being extremely long) fits the function of absorving nutrients.