Sunday, July 21, 2013

Digestive System and It's purpose as well as function

Digestion: Digestive may be defined as a physiological process by which complex food particles are broken down into simple form, suitable for absorption and subsequent utilization.


Purpose of digestion
   Supply energy to the body for activity
   For the growth of the body
   For the repair of ware and tear
   For the reproduction and lactation.
Digestive system 

   

Parts of digestive system
  Mouth or buccal cavity with tongue
  Oropharynx
  Esophagus
  Stomach
  Small intestine –Duodenum, Jejunum and ileum .
  Large intestine – Caecum, Ascending colon, Transverse colon, Descending colon, Rectum, Anal canal.

Accessory parts of digestive system
Teeth
Salivary glands – Parotid, Submandibular, Sublingual.
Liver
Pancreas
Gall bladder
Other digestive glands in the wall of the digestive tract.

Alimentary tract : Extend from mouth to anus with their associated glands.

              Gastrointestinal tract (GIT) : Extend from stomach to anus.
Function of digestive tract
Ingestion of food
Digestion of food
Secretion of various digestive juice .
Excretion of heavy metals, toxins etc.
Helps in movement of food through it.
Regulation f acid base balance.
Regulation of water balance.
Regulation of blood sugar level.
Helps in erythropoiesis.