hi friends this slide is to understand about digestive system in humans.you can refer it for revision of the lesson.this slide is for grade 7

1. S.Niveddhika 7E

2.  Digestion is a process in which complex food
material is broken down into simpler
substances.
 WHERE DOES THE DIGESTION OF HUMANS
TAKES PLACE ?
 The digestion of food takes place in the
alimentary canal, which is a long tube
extending from mouth to the anus.

4. The different parts of the alimentary canal are Bucal
cavity, food pipe or oesophagus, stomach, small
intestine, large intestine and anus. The two glands
namely, liver and pancreas also helps in digestion.

5.  The food is taken in through the mouth. It is
chewed and mixed with saliva in the Bucal
cavity. Saliva is a digestive juice secreted by
the salivary gland.
 THE SALIVARY GLAND

6.  The chewed food enters into the food pipe or
oesophagus then it slowly pushed into the
stomach to further break it down. The
stomach also secretes mucus, digestive juices
and hydrochloric acid. The hydrochloric acid
kills the bacteria in the food and makes it
acidic.

7.  The food then goes into the high coiled tube
called small intestine. The small intestine
receives secretions from the liver and
pancreas. The liver secretes bile juice while
the pancreas secretes pancreatic juice.