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Question

In which part of the alimentary canal, food is finally digested?
  1. Mouth cavity
  2. Stomach
  3. Large intestine
  4. Small intestine

A
Small intestine
B
Mouth cavity
C
Large intestine
D
Stomach
Solution
Verified by Toppr

Hint: Digestion starts from the mouth itself just after ingestion of food and continues throughout in the different organs of the alimentary canal sequentially until it finally reaches the large intestine where only absorption takes place after which undigested food will be egested through the anus.

Part 1 - Definition - Human digestive system
  • In the human digestive system, there are many parts that work together to convert the food we eat into simpler forms so that your body can absorb it.
  • The human digestive system includes the gastrointestinal tract and other accessory parts like the liver, intestines, glands, mouth, stomach, gallbladder.
  • There are 6 primary functions of the human digestive system process: Ingestion, Motility, Secretion, Digestion, Absorption, Excretion.

Part 2 - Parts of the Digestive system
  • The different organs of the alimentary canal can be explained as –
Mouth - The starting point where digestion actually starts is the mouth with the help of saliva. From the mouth, food enters the Oesophagus.
Oesophagus - It is a long and thin muscular tube that passes through the neck, thorax, and diaphragm and opens into a muscular bag-like structure called the stomach.
Stomach - It is a muscular, hollow organ, having a capacity of 1 litre. The stomach holds food and also is a mixer and grinder.
Small Intestine - The longest part of the alimentary canal, which is divided into three parts- Duodenum, Jejunum, and Ileum. The ileum opens into the large intestine. Maximum digestion and absorption take place here.
Large Intestine - It is a wide tube consists of three parts- Caecum, Colon, and Rectum. The colon is divided into four regions-ascending colon, transverse colon, descending colon, and the sigmoid colon. Through the sigmoid colon, the descending part of the colon opens into Rectum. The rectum is the distal part of the alimentary canal that opens into the anus.

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