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Diegestive System
Digestive systyem notes
Question | Answer |
---|---|
where does protein digestion start? | It starts in stomach and is finished in small intestine |
what breaks protein down? | Mainly gastric juices enzyme pepsin partially digest protein. Pancreatic enzyme and intestinal enzymes do the rest. |
What breaks fat down? | bile contains no enzymes but emulsifies fats into the duodenum to break down into small droplets |
what does pancreatic lipase do in fat digestion? | it emulsifies fats in small intestine |
what happens in absorption? | digested food moves from intestine into blood or lymph. |
where does food and most water absorption take place? | small intestine |
what may be absorbed in large intestine? | water |
where is carbohydrate digestion located? | mainly small intestine |
whats breaks down carbohydrates in digestion? | pancreatic amylase,intestinal juices enzymes |
what is digestion? | changes foods so that they can be used by cells. |
what are the two types of digestion? | Mechanical and chemical digestion |
what is mechanical digestion? | physical movement, physical changes in food |
what is chemical digestion? | when food is broken down by chemicals such as enzymes |
what is the appendix? | worm like tubular structure located off the cecum of the large intestine that has no important function in humans |
how long is the large intestine ? | 5 feet long |
where is the large intestine located? | forms lower portion of digestive system |
what passes through the large intestine? | undigested and unabsorbed food enter large intestine after passing through the ileocecal valve |
what is the ileocecal valve? | A sphincter that is the junction of the small intestine and the large intestine |
how long does it take material to pass through the large intestine? | 3 to 5 days |
What are the subdivisions of the large intestine in order? | cecum, ascending colon , transverse colon, descending colon, sigmoid colon, rectum, anal canal |
what is the exterior opening called? | anus |
what is the wall of the large intestine made of ? | smooth muscles fibers |
what movements occur in the large intestine ? | the contracting smooth muscles fibers to produce churning, peristalsis, and defecation |
where is the pancreas located? | behind stomach |
what is the function of the pancreas? | secretes pancreatic juices |
what do pancreatic juices do? | contains enzyme |