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Digestive (alimentary) system
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Alimentary canal: tubular passage for digestion and absorption of food and the elimination of food residue; begins at the mouth and ends at the anus
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Ingestion Taking substances like food or drink into the body through the mouth. Digestion the break down of large food pieces into small, water soluble molecules
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Mouth: the opening through which an animal or human takes in food
Ingestion, Digestion
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Salivary Glands Digestion
Glands that produce saliva, an important part of chemical digestion in the mouth enzyme - amylase Digestion
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Esophagus: a muscular passage connecting the mouth with the stomach
Food moves down the esophagus via peristalsis – muscles contract and relax
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Liver: large gland responsible for:
1) the uptake, storage, and disposal of nutrients and toxins 2) the production of proteins and metabolism of substances produced by the body Digestion, Assimilation
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Pancreas: a gland, near stomach; secretes a digestive fluid into the intestine through one or more ducts and also secretes the hormone insulin Digestion
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Gall Bladder: Digestion
stores Bile; a yellow-green liquid made in the liver used to break up fats Digestion
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Stomach: a saclike enlargement of the alimentary canal; forming an organ for storing, diluting, and digesting food Digestion
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Small intestine: lies between the stomach and colon, consists of duodenum, jejunum, and ileum, secretes digestive enzymes, and is the chief site of the absorption of digested nutrients Absorption Absorption – the movement of digested food molecules through the wall of the intestine into the blood
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Duodenum:the first portion of the small intestine, from the stomach
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Jejunum: middle portion of the small intestine; between the duodenum and the ileum
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Ileum:the third and lowest division of the small intestine
Assimilation – the movement of digested food molecules into the cell where they are used
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Large intestine: terminal division of the vertebrate intestine that is wider and shorter than the small intestine; divided into cecum, colon, and rectum; reabsorption of water and the formation of feces Some Absorption
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Colon: the part of the large intestine extending from the cecum to the rectum
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Rectum: terminal part of the intestine from the colon to the anus
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Anus: the opening at the lower end of the alimentary canal, through which the solid refuse of digestion is excreted
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Egestion Passing food through the anus that has not been digested;
Called faeces
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