presentation_dig_1_1603709145_397373.pptx

Biology

1. DIGESTION AND ABSORPTION BY:- AKANKSHA

2. AKANKSHA INTRODUCTION The process of conversion of complex food to simple forms is called digestion. IT is carried out by our digestive system by mechanical and biochemical methods .

3. AKANKSHA The human digestive system consists of the alimentary canal and the associated glands. DIGESTIVE SYSTEM

4. AKANKSHA Alimentary Canal The alimentary canal begins with anterior opening i.e. mouth and it end with posteriorly through the anus. The mouth leads to the buccal cavity or oral cavity . The oral cavity has a number of teeth and a muscular tongue .. This type of attachment is called thecodont .

5. AKANKSHA Tooth Each tooth is embedded in a socket of jaw bone. Majority of mammals forms two sets of teeth during their life , i.e. a set of temporary teeth (deciduous teeth) and a set of permanent ( adult teeth).

6. AKANKSHA This type of dentition is called diphyodont. Adult human has 32 permanent teeth. i.e. four different types namely , incisors (I), canine (C), premolars (PM) and molars (M). dental formula which in human is 2123/ 2123

7. AKANKSHA part of teeth Enamel :- The hard chewing surface of the teeth, helps in the mastication of food . CEMENTUM, DENTIN, PULP….

8. AKANKSHA Tongue :- is a freely movable muscular organ which is attached to the floor of the oral cavity by the frenulum . The upper surface of the tongue has small projections called papillae , some of which bear taste buds.