Question

Finger- like projection present in large intestine are called _______
(a) Jejunum
(b) Colon
(c) Villi
(d) Rectum

Answer 1

Hint: It is found in the small intestine that helps in the digestion and absorption of food. They have an outsized area so there'll be more efficient absorption of fatty acids and glycerol into the bloodstream. They need an upscale blood supply to stay at a degree gradient.

Complete answer:
Intestinal villi are small, finger- like projections that reach into the lumen of the intestine. Villus is around 0.5–1.6 millimeters long in humans, and it has many microvilli projecting from the enterocytes of its epithelium that altogether shape the striated or brush border. Villi increases the interior area of the intestinal walls making obtainable a greater area for absorption. An increased absorptive area is important for digested nutrients which include monosaccharide and amino acids to pass within the semipermeable villi through diffusion.
- The villi increases intestinal absorptive area around 30- fold and the microvilli increases intestinal absorptive area around 600- fold, providing unusually systemic absorption of nutrients within the lumen.
- There are also enzymes (enterocyte digestive enzymes) on the surface for digestion. Villus capillaries collect amino acids and straightforward sugars haunted by the villi into the bloodstream. Villus lacteals are also known as lymph capillary, which collects absorbed chylomicrons, which are lipoproteins composed of triglycerides, cholesterol, and amphipathic proteins that are taken to the remainder of the body through the lymph fluid.
- Villi are specialized for absorption within the intestine as they need a skinny wall, one cell thick, which enables a shorter diffusion path.

So, the correct answer is ‘Villi’.

Note: The large intestine is the portion of the gastrointestinal system most liable for the absorption of water from the indigestible residue of food. Consisting typically of 4 regions: the cecum, colon, rectum, and anus. The valve of the ileum (small intestine) passes material into the large intestine at the cecum.