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Digestive (alimentary) system

Digestive (alimentary) system. 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 . Ingestion. Taking substances like food or drink into the body through the mouth. Digestion

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Digestive (alimentary) system

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  1. Digestive (alimentary) system

  2. 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

  3. 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

  4. Mouth: the opening through which an animal or human takes in food Ingestion, Digestion

  5. Salivary Glands • Glands that produce saliva, an important part of chemical digestion in the mouth enzyme - amylase Digestion

  6. Esophagus: a muscular passage connecting the mouth with the stomach Food moves down the esophagus via peristalsis – muscles contract and relax

  7. 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

  8. Pancreas: a gland, near stomach; secretes a digestive fluid into the intestine through one or more ducts and also secretes the hormone insulin Digestion

  9. Gall Bladder: • stores Bile; a yellow-green liquid made in the liver used to break up fats Digestion

  10. Stomach: a saclike enlargement of the alimentary canal; forming an organ for storing, diluting, and digesting food Digestion

  11. 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

  12. Duodenum:the first portion of the small intestine, from the stomach

  13. Jejunum: middle portion of the small intestine; between the duodenum and the ileum

  14. Ileum:the third and lowest division of the small intestine • Assimilation – the movement of digested food molecules into the cell where they are used

  15. 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

  16. Colon: the part of the large intestine extending from the cecum to the rectum

  17. Rectum: terminal part of the intestine from the colon to the anus

  18. Anus: the opening at the lower end of the alimentary canal, through which the solid refuse of digestion is excreted

  19. Egestion • Passing food through the anus that has not been digested; • Called faeces

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