Biology,

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Biology – Human Digestion and Absorption

* Digestion is the process of conversion of complex food substances to simple absorbable forms is called digestion.

* When the process of digestion occurs within the cell in the food vacuole, it is called Intracellular.
Protozoa, Porifera, Coelenterata and free living Platyhelminthes are some examples of this type.

* When the process of digestion occurs outside the cell,it is called Extracellular. Examples are Coelenterates and phylum Platyhelminthes to phylum Chordata.

Digestive Glands are Salivary glands –

Characteristic features of Salivary glands –

* These are the glands with ducts which also secrete amylase.

* These are the exocrine glands that produce saliva.

* Amylase is an enzyme that breaks down starch into maltose.

* Three types of salivary glands are as follows-
They are  Parotid gland, Submandibular gland and Sublingual gland

Pancreas –

* It produces several important hormones like insulin, glucagon, somatostatin and pancreatic polypeptide.

*Complete digestive juice is pancreatic juice as it contains amylolytic, lipolytic and proteolytic enzymes.

Liver –

* It is the largest digestive gland of the body .It weighs about 1.2 to 1.5 Kg in an adult human.

* It helps in protein synthesis.

* It is situated in the abdominal cavity, just below the diaphragm

*It detoxifies various metabolites

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