Digestive+System+BA

1. Name and describe the processes that occur during the digestive process. Chewing, Swallowing, digestion, excretion. The organs involved are the mouth, large intestine, small intestine, stomach liver and anus. 2. What are the four layers of the GI tract? Associate an illness with each of the layers. (Describe the Illness) Mouth, Stomach, Intestines, Anus. Mouth-cancer, stomach-ulcer, Intestinal parasites, anus/rectum- prostate cancer 3. Describe the mechanical digestion and the chemical digestion that occurs in the mouth. First the teeth chew the food, then the saliva begins to break down the food into simple sugars, and then the food is swallowed 4. What ordinarily prevents food from entering the nose or entering the trachea when you swallow? The soft palate uvula 5. What are the functions of the stomach, and how is the wall of the stomach modified to perform these functions? The stomachs function is to further digest the food. One of the ways the stomach is modified is that the walls covered in mucus o protect it from acid. 6. What are the functions of the small intestine and how is the wall of the small intestine modified to perform these functions? Small intestines absorbed the nutrients. Small intestines are equipped with lumen to absorb more nutrients. 7. What are the three main accessory organs that assist with the digestive process? The pancreas, liver and gallbladder. 8. How does each accessory organ contribute to the digestion of food? Liver is largest gland in body, it filters blood. Excess bile from liver is stored in gallbladder. Pancreas secrets insulin. 9. What are the different parts of the large intestine? The secum, colon and vermiform. 10. What are the functions of the large intestine? Water and vitamin absorption.