Question

How does the structure of small intestine help on increasing the surface area of absorption ?​

Answer 1

Answer:

The interior walls of the small intestine are tightly wrinkled into projections called circular folds that greatly increase their surface area. Microscopic examination of the mucosa reveals that the mucosal cells are organized into finger-like projections known as villi, which further increase the surface area.

Answer 2

In this question, we need to tell how the structure of the small intestine help in increasing the surface area of absorption.

• The mucosal layer of the small intestine contains numerous projections which are called villi. Villi help in increasing the surface area for absorption for digestion.
• Villi are mostly present in the duodenum whereas jejunum and ileum have microvilli in the mucosal layer. Microvilli have crypt of Lieberkühn.
• Numerous lymph vessels are present in the villi which are called lacteals. Lacteals help in the transport of protein-coated fat droplets called micelles.
• Our alimentary canal have four layers namely serosa, muscularis, sub mucosa and mucosa.

PROJECT CODE #SPJ3