1、Unit 3 . cn esophagus insideeat, consume bladder-膀胱，囊膀胱，囊gall- 膽汁膽汁 gallbladder maltose -ose: sugar glucose gluc-/glyc-: sugar dissolve separate, remove detergent sterol 固醇固醇,甾酮甾酮 chole 膽的膽的 cholesterol cholecystokinin n. 縮膽囊素縮膽囊素 cholecystic adj. 膽囊的膽囊的 acetylcholine n. 乙酰膽堿乙酰膽堿 h

2、ormone gastrin secretin cholecystokinin pepsin renal:of the kidney adrenaline Introduction Use brief words to introduce the following terms. v mucosa v digestion vmucosa Lining of the hollow organs of the digestive system that contains tiny glands to help digest food. vdigestion A process by which f

3、ood and drink are broken down into their smallest parts used by the body. a. swallowed. b. esophagus c. stomach d. small intestine e. intestinal walls f. colon Task: Explain the process of movement of food through the system. Movement of Food Through the System Weakening of the lower esophageal sphi

4、ncter can lead to a severe condition called gastroesophageal reflux disease (GERD). Typical movement of food through the system peristalsis Task: Read this part and fill in the following table. Production of Digestive Juices glandsJuices produced functions in the mouth in the stomach in the pancreas

5、 in the liver in the intestine saliva gastric acid pancreatic juice digest the starch into smaller molecules digests protein break down the carbohydrate, fat and protein bile dissolve the fat into the watery contents of the intestine intestinal fluid Produces some enzymes to help digest food Absorpt

6、ion and Transport of Nutrients Task To each kind of nutrients, who play the main role in the process of the breaking of molecules? nutrientsbroken down or absorbed by Carbohydr ates Protein Fats Vitamins Water and salt the saliva, the pancreatic juice, the lining of the small intestine. stomach juic

7、e, small intestine the bile acids the small intestine the small intestine How is the digestive process controlled How do the major hormones control digestion? ( gastrin, secretin, cholecystokinin ) functions gastrin secretin cholecysto kinin causes the stomach to produce acid, necessary for the norm

8、al growth of the lining of causes the pancreas stimulates the stomach stimulates the liver causes the pancreas causes the gallbladder Nerve Regulators Two types of nerves help to control the action of the digestive system. uaorta uvena cava uatrium uventricle usystole udiastole uartery uvein ucapillary intercalated disk sinoatrial node atrioventricular node septum pulmonary stethoscope coronary artery valve terms review Classwork 1) esophagus 2) intestine 3) rectum 4) mucosa 5) peristalsis 6) enzyme 7) gland 8) pancreas 9) colon 10) saliva 11) carbohydrate 12) glucose 13) amino acid