◆ what is digestive system ? with pic.
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Answer :-
Digestive system: The system of organs responsible for getting food into and out of the body and for making use of food to keep the body healthy.
★ Digestive includes :-
The digestive system includes the salivary glands, mouth, esophagus, stomach, liver, gallbladder, pancreas, small intestine, colon, and rectum.
★ Salivary glands :-
The salivary glands in mammals are exocrine glands that produce saliva through a system of ducts. Humans have three paired major salivary glands (parotid, submandibular, and sublingual), a pair of seromucous tubarial glands (discovered in 2020) as well as hundreds of minor salivary glands.
★ Gall bladder :-
The gall bladder is a small pouch that sits just under the liver. The gall bladder stores bile produced by the liver. After meals, the gall bladder is empty and flat, like a deflated balloon. Before a meal, the gall bladder may be full of bile and about the size of a small pear.
★ Pancreas :-
The pancreas is an organ located in the abdomen. It plays an essential role in converting the food we eat into fuel for the body's cells. The pancreas has two main functions: an exocrine function that helps in digestion and an endocrine function that regulates blood sugar.
★ Colon and rectum :-
- A cancer of the colon or rectum, located at the digestive tract's lower end.
- Early cases can begin as non-cancerous polyps. These often have no symptoms but can be detected by screening. For this reason, doctors recommend screenings for those at high risk or over the age of 50.
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Answer:
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion. Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.