ANATOMY

Detailed explanation-1: -The lining of the small intestinal mucosa is very highly specialized for maximizing digestion and absorption of nutrients. The lining is highly folded to form microscopic finger-like projections called villi which increase the surface area to help with absorption.

Detailed explanation-2: -These villi are also full of microscopic hair-like structures called microvilli. Villi and microvilli help increase the surface area of the small intestine which supports optimum absorption of nutrients from the digested food.

Detailed explanation-3: -Millions of microscopic, finger-like projections called villi (VIH-lie) line the inside of the small intestine. The villi make lots of surface area for nutrients to get absorbed into the blood.

Detailed explanation-4: -In a process called active transport, specialized intestinal cells of the villi allow the passage of B-12, iron and calcium into the bloodstream.

Detailed explanation-5: -Formation of finger-like structure follows two processes: pore initiation and growth. As a polymer solution undergoes a liquid-liquid phase separation, both polymer-rich and polymer-lean phases are developed. The nuclei of the polymer-lean phases initiate the finger-like structure.