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... Dr. Nabil Khouri ...
Session 1 Worksheet - Iowa State University
Session 1 Worksheet - Iowa State University

... Odd Man Out: Choose the word in each group that does not belong. If not already given, indicate what the words have in common. Alimentary Canal Mouth Esophagus Stomach Liver ...
File - King`s General Science
File - King`s General Science

... Not All food needs digesting! Simple sugars, water, vitamins & minerals are small molecules and can be absorbed as they are – they do not need to be digested! ...
Grade Rubric
Grade Rubric

... __________/65 TOTAL POINTS ...
How Do Animals Digest Food and Absorb Nutrients? 1. For each of
How Do Animals Digest Food and Absorb Nutrients? 1. For each of

... 4. Indicate the role of the crop and gizzard in birds, and the rumen in mammals; what type of diet is associated with these structures? ...
Digestive System
Digestive System

... • peristalsis – muscle contractions, moves food through tract ...
The Digestive System
The Digestive System

... from blood. Pancreas: •Produces sodium bicarbonate to neutralize stomach acid. •Secretes digestive enzymes and hormones (glucagon and insulin). •Secretions from the liver and pancreas empty into the duodenum through ducts. ...
Tissue- Collection of cells working together to perform a function
Tissue- Collection of cells working together to perform a function

... Small Intestine- Majority of nutrients are absorbed here. Duodenum is the first section of S.I. and most nutrients absorbed in this section. Pancreatic juices and Bile are secreted into S.I. to break down fats. Bile is made by the Liver and stored in the gall bladder. ...
oral cavity
oral cavity

... masses of chewed food from the mouth to the esophagus. The pharynx also plays an important role in the respiratory system, as air from the nasal cavity passes through the pharynx on its way to the lungs. ...
Slide 1
Slide 1

... canal – GI tract ...
< 1 ... 113 114 115 116 117

Human digestive system



In the human digestive system, the process of digestion has many stages, the first of which starts in the mouth (oral cavity). Digestion involves the breakdown of food into smaller and smaller components which can be absorbed and assimilated into the body. The secretion of saliva helps to produce a bolus which can be swallowed to pass down the oesophagus and into the stomach.Saliva also contains a catalytic enzyme called amylase which starts to act on food in the mouth. Another digestive enzyme called lingual lipase is secreted by some of the lingual papillae to enter the saliva. Digestion is helped by the mastication of food by the teeth and also by the muscular contractions of peristalsis. Gastric juice in the stomach is essential for the continuation of digestion as is the production of mucus in the stomach.Peristalsis is the rhythmic contraction of muscles that begins in the oesophagus and continues along the wall of the stomach and the rest of the gastrointestinal tract. This initially results in the production of chyme which when fully broken down in the small intestine is absorbed as chyle into the lymphatic system. Most of the digestion of food takes place in the small intestine. Water and some minerals are reabsorbed back into the blood, in the colon of the large intestine. The waste products of digestion are defecated from the anus via the rectum.
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