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  • Describe the alimentary canal of man.

Describe the alimentary canal of man.

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Alimentary canal of man: It measures about 8 to 10 meters starting from the mouth and extending to the anus.

  1. Mouth: It consists of the oral cavity which contains the lips, the inside lining of the lips and cheeks, teeth, gums, the front two-thirds of the tongue, the floor of the mouth below the tongue, and the bony roof of the mouth.
    Food is broken into small parts and salivary glands secrete saliva which is mixed with the food by the tongue.
  2. Pharynx: The oral cavity opens into the pharynx. The swallowing mechanism guides masticated food down to the stomach.
  3. Oesophagus: A muscular tube connecting the pharynx to the stomach. Muscular movement in the oesophagus moves the food to the stomach.
  4. Stomach: It is a J-shaped sac-like muscular structure where masticated food is mixed with gastric juices which are secreted by the lining of the stomach.
  5. Small intestine: It is a tube-like structure about 6 meters where pancreatic juice and bile juice get mixed. The small intestine is rich with blood vessels where chemical digestion happens and the food is absorbed and delivered to all the parts of the body.
  6. Large intestine: Unabsorbed food is sent to the large intestine where water is absorbed from this food. The rest of it is removed from the body via the anus. The exit of waste material is regulated by anal sphincter.

 

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