ap biology DIGESTION

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organs involved in the digestive system
Dhiti Jha
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Dhiti Jha
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ORAL CAVITY -TEETH -TONGUE Oral cavity is the space b/w the teeth and the sarcus terminales (present on the tongue which demarks oral cavity from pharynx)
teeth consists of 3 parts:- a)CROWN-visible above the gum,made of enamel which is the hardest substance of human body and is a secretion of ameloblast cells of the dentine b)DENTINE -made of thin canaliculi , is made of secretions from odontoblast present in the lining of the pulp cavity c)PULP CAVITY-it consists of nerves
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