Unit 1 The Department of Osteology 

Unit 2 The Department of Cardiology 

Unit 3 The Department of Forensic Medicine 

Unit 4 The Department of Public Health 

Unit 5 The Department of Oncology 

Unit 6 The Department of Digestion 

Unit 7 The Department of Gynecopathy 

Unit 8 The Department of Urology 

Unit 9 The Department of Hematology 

Unit 10 The Department of Acupuncture & Moxibustion 

Unit 11 The Department of Endocrinology 

Unit 12 The Department of Hepatology 

Unit 13 The Department of Radiology 

Unit 14 The Department of Dermatology 

Unit 15 The Department of Venereology 

Unit 16 The Department of Family Planning 

Unit 17 Medium Pharmacy 

Unit 18 The Department of Ophthalmology 

Unit 19 Nursing Department 

Unit 20 The Department of Pediatrics 

Unit 21 The Department of Obstetrics 

Unit 22 The Department of Immunology 

Unit 23 The Department of Rheumatology 

Unit 24 The Department of ENT 

Unit 25 The Department of Geriatrics 

Unit 26 The Department of Disease Prevention 

Unit 27 The Department of Integral Medicine

Digestion is the breakdown of food into smaller components that can be more easily absorbed and assimilated by the body.In certain organisms,these smaller substances are absorbed through the small intestine into the blood stream.Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion.The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes.In chemical digestion,enzymes break down food into the small molecules the body can use. 

Human Digestive System 

In the human digestive system,food enters the mouth and mechanical digestion of the food starts by the action of mastication,a form of mechanical digestion,and the wetting contact of salivA.Saliva,a liquid secreted by the salivary glands,contains salivary amylase,an enzyme which starts the digestion of starch in the food.After undergoing mastication and starch digestion,the food will be in the form of a small,round slurry mass called a bolus.It will then travel down the esophagus and into the stomach by the action of peristalsis.Gastric juice in the stomach starts protein digestion.Gastric juice mainly contains hydrochloric acid and pepsin.As these two chemicals may damage the stomach wall,mucus is secreted by the stomach,providing a slimy layer that acts as a shield against the damaging effects of the chemicals.At the same time protein digestion is occurring,mechanical mixing occurs by peristalsis,which is waves of muscular contractions that move along the stomach wall.This allows the mass of food to further mix with the digestive enzymes.