name three digestive gland and write their functions
Answers
Hey mate here is your answer:-
1. Salivary gland
The salivary glands are one of the important exocrine glands. The main function of the salivary gland is to produce saliva. Saliva has many functions in the digestion process as follows:
a] It is used to lubricate the mouth.
b] It helps to swallow the food.
c] It helps to protect the teeth from bacterial infections.
d] It aids in the food digestion.
2. Liver
The liver is one of the digestive glands and plays an important role in the digestive system. It is the largest gland of the human body. It is located in the abdominal cavity. The liver is connected to the two following large blood vessels.
Hepatic vein – It is used to carry the blood, which is rich in oxygen.
Portal vein – It is used to carry the blood, which is rich in digested nutrients.
3. Pancreas
The pancreas is a gland which has two functional units to secrete both endocrine and exocrine enzymes. It is located between the duodenum limbs. Pancreas consists of two portions as follows:
Endocrine portion – It is used to secrete the hormones, insulin, and glucagon which circulate into the bloodstream.
Exocrine portion – It is used to secrete the digestive enzymes into the small intestine which are called as pancreatic juice.
Hope this helps you....
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Salivary Glands:
In man there are three pairs of salivary glands (sub maxillary, sublingual, and parotid) which secrete saliva. Saliva contains an enzyme called salivary amylase which breaks down starch (complex substance) of the food into maltose (a simpler sugar). Thus, in the mouth cavity saliva moistens the masticated food and starts digestion of carbohydrate.
Gastric Gland:
The gastric glands secrete hydrochloric acid and gastric juice which help in digestion of food. The enzyme pepsin present in the gastric juice acts on the proteins of the food and breaks them into smaller units called peptones and proteoses. The food then passes into the small intestine.
Intestinal Glands:
The final step of digestion takes place in the ileum. There are numerous smaller glands occupying the walls of the small intestinal tract. These glands secrete what is termed intestinal juice or succus entericus. The intestinal glands are in the form of sunken pits or crypts which are interspersed among the finger-like villi. The digestive enzymes in the intestinal juice include carboxypeptidase and aminopeptidase which break small peptides into amino acids; sucrose, maltase and lactase which brak disaccharides into respective monosaccharides; lipase which breaks lipids into fatty acid and glycerol; and nuclease which breaks nucleic acids into nucleotides
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