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.