Question

explain parts of alimentary canal

Answer 1

Alimentary canal, also called digestive tract, pathway by which food enters the body and solid wastes are expelled. The alimentary canal includes the mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus. 

Mouth

Mouth is the opening through which intake of food occurs.

Oral cavity

The oral cavity has three parts –palate, tongue, and teeth.

Palate -It forms the roof of the oral cavity. Anterior part is called hard palate and the posterior part is called soft palate.

Teeth

Humans are diphyodont i.e. they have two sets of teeth- milk or deciduous and permanent teeth. Here is the list of different types of teeth in humans with their functions.

Pharynx

It forms the common passage for food and air.

Esophagus

It is a muscular tube through which small bolus of food passes from the mouth to the stomach. It is sharply bent at the point at which it meets the stomach.

Stomach

It is a muscular bag which has three parts- cardiac part, fundus, and body.

Cardiac part– It is so called because it is present close to the heart. The opening of the esophagus to the stomach is regulated by the cardiac sphincter.Fundus– It is dome-shaped and is usually filled with air.Body– This is the main part of the stomach. The opening of the stomach into the small intestine is regulated by the pyloric sphincter.Small Intestine

It is the longest part of the alimentary canal and comprises three parts- Duodenum, Jejunum, and Ileum.

arge Intestine

The small intestine leads into the large intestine which has three parts- Caecum, Colon, and Rectum.

Hope it helps you

Answer 2

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The longest part of alimentary canal is SMALL INTESTINE

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Write different parts of alimentary canal are :

• Bucal  Cavity - Mouth, also called oral cavity or buccal cavity, in human anatomy, orifice through which food and air enter the body. The mouth opens to the outside at the lips and empties into the throat at the rear; its boundaries are defined by the lips, cheeks, hard and soft palates, and glottis.
• Foodpipe or oesophagus - The food pipe (oesophagus) is part of your digestive system. It is the tube that carries food from your mouth to your stomach. It lies behind the windpipe (trachea) and in front of the spine.
• Stomach - the organ in your body where food goes after you have eaten it
• Small intestine - the part of the intestine that runs between the stomach and the large intestine; the duodenum, jejunum, and ileum collectively.
• Large intestine - The long, tube-like organ that is connected to the small intestine at one end and the anus at the other. The large intestine has four parts: cecum, colon, rectum, and anal canal. Partly digested food moves through the cecum into the colon, where water and some nutrients and electrolytes are removed.
• Rectum and Anus - The rectum is a chamber that begins at the end of the large intestine, immediately following the sigmoid colon, and ends at the anus (see also Overview of the Anus and Rectum).

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