Digestive system nutrition in human beings for 10th cbse

DIGESTIVE SYSTEM IN HUMAN BEINGS 
1.Digestive system in human beings consists of following parts
Buccal cavity
Pharynx
Oesophagus
Stomach
Small intestine
Large intestine
Rectum
Anus
2.BUCCAL CAVITY
Buccal cavity has following parts
Teeth
Tongue
Salivary glands
Teeth:
teeth helps in chewing food.
Chewing good is called mastimasturbation.
Tongue:
Tongue helps in taste,speech,swallowing of food .
Swallowing is called definition 

Formulas for 10th Cbse boards are as fallows
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EVOLUTION
gradual development of simple living organisms to complex living organisms is called evolution.

https://youtu.be/rHhykBHz2s8https://youtu.be/rHhykBHz2s8
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