Lecture 1 - Digestive System

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Lecture 1 - Digestive System
2014-10-23 20:16:52
Digestive System
Lecture 1
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  1. What are the four main functions of the digestive system?
    Ingestion; digestion; absorption and defecation
  2. What is ingestion?
    Taking in of food
  3. What is digestion?
    chemical and mechanically breakdown food
  4. What is absorption?
    passage of food from the GI tract into the cardiovascular system
  5. What is defecation?
    elimination of the wastes
  6. How long is the alimentary canal or GI tract?
    approximately 30 feet long from mouth to anus
  7. What is the general organization of the digestive tract?
    Mouth--Pharynx--Esophagus--Stomach--Small and Large Intestines
  8. What are the accessory glands of the digestive system?
    Salivary glands; liver; gallbladder; and pancreas
  9. What are the different parts of the mouth?
    Hard palate; soft palate; teeth and tongue
  10. Where is the hard palate?
    Roof of oral cavity and anterior to the soft palantine
  11. What is the hard palate made of?
    Made of palantine and maxilla bones and lined with mucus membrane
  12. Where is the soft palate?
    Posterior to the hard palate
  13. What does the soft palate consist of?
    Contains the uvula, which closes off the nasopharynx when swallowing
  14. What is the purpose of the teeth to the digestive system?
    To chew or masticate; composed of Dentin and covered by enamel
  15. What are the two kinds of teeth?
    Deciduous (milk) and Permanent
  16. How many dediduous teeth are there?
  17. Describe the deciduous (milk) teeth
    there are 20; no premolars; there are 10 in the aveolar process of the maxilla and mandible; in the half jaw there are 2 incisors; 1 cuspid or canine and 2 molars
  18. What is the dental formula for the deciduous teeth?
    2-1-2 over 2-1-2
  19. How many teeth do adults have for their permanent teeth?
  20. Describe permanent teeth
    there are 32; 16 in aveolar process of maxilla and mandible; in the half jaw there are 2 incisors; 1 cuspid or canine; 2 premolars or bicuspids; 3 molars or tricuspids; wisdom tooth
  21. What is the dental formula for permanent teeth
    2-1-2-3 over 2-1-2-3
  22. What is the job of the incisor?
    cutting or biting food
  23. What is the job of the canines?
    tearing food
  24. What is the job of the premolars and molars?
    crushing and grinding food
  25. What are the different parts of the tongue?
    The main part (skeletal muscle); lingual frenulum;  and papillae
  26. The skeletal muscle of the tongue is covered with?
    a mucus membrane
  27. What is the lingual frenulum?
    it attaches the tongue to the floor of the oral cavity
  28. What is the papillae?
    projections covered with epithelium on the tongue, some contain taste buds
  29. What are the three types of papillae?
    fungiform; filiform and circumvallate
  30. What is fungiform?
    mushroom like elevations among the filiform and tip; appears as red dots; most contain taste buds
  31. What is the filiform?
    most numerous; conical projections on the anterior; 2/3; parrellel rows; contain NO taste buds
  32. What is the circumvallate?
    Arranged in the form of an inverted "V"; on the posterior and all contain taste buds
  33. Which papillae portion does not contain taste buds?
  34. Which part of the papillae tastes sweet food?
  35. What part of the papillae is the circumvallate found?
    the posterior part of the tongue
  36. Where is the filiform found?
    In the center of the tongue
  37. Where is the fungiform found?
    the tip of the tongue