Question

The undigested, semisolid food is called?
A. Anus
B. Faeces
C. Rectum
D. Villi

Answer 1

Hint: The digestive system of humans consists of a long muscular tube and several accessory organs and glands like salivary glands, pancreas, and gall bladder. The digestive system is responsible for food ingestion and digestion, absorption of digestion products, and elimination of the products or materials that are not absorbed from the digestive tract.

Complete answer:Option -A- Anus: It is the opening at the lower end of the digestive tract through which solid waste is excreted. The anus has two sphincters internal and external anal sphincter. The internal anal sphincter is composed of smooth muscles this not under voluntary control whereas the external anal sphincter is composed of skeletal muscles and is under voluntary control.
Option -B-Faeces: The feces are unabsorbed or undigested semi-solid food in the Large Intestine which is eliminated through the anus.
Option -C- Rectum: The rectum is the distal-most segment of the large intestine and has an important role as a temporary store of feces. It is continuous proximally with the sigmoid colon.
Option -D- Vili: In our body absorption of food mainly takes place in the small intestine. The inner wall of the small intestine is highly folded and has many projections called villi. The structure of villi is specially adopted for food absorption. The villi are finger-like and large in number. This feature greatly increases the surface area for absorption. The epithelium of villi is only one-cell thick this provides a very short distance for the diffusion of food molecules into the blood. The cell membrane of the epithelial cell has a large no of microvilli, these microvilli further increase the surface area for absorption.
So, the correct answer is option B ” Faeces"

Note: Partially digested semisolid food formed in the stomach is called "Chyme" (semisolid mass of partially digested food and digestive secretions during the digestion process) whereas undigested semi-solid food remaining in the large intestine is called "Faeces".