The Oral Cavity a k a MOUTH The
- Slides: 11
The Oral Cavity--- a. k. a. ____MOUTH_______
• The Saltine Cracker Challenge!
Major Functions of the Mouth 1. Initial analysis 2. Mech. process 3. Lubrication 4. Limited Digestion ** But NO absorption of nutrients
MOUTH PARTS! 1. lips = labia 2. vestibule = space between cheeks and teeth 3. gingiva = gums Can be paplated. . . 4. hard palate = most anterior roof of mouth Can be paplated. . . 5. soft palate = posterior roof of mouth 6. uvula = hangs in back 7. Tongue helps… a. Mech. Processing… (compression) b. Assists in chewing c. detects senses like touch/ temp/ taste d. secretes mucus and the enzyme lipase which breaks down lipids
More Parts…. 8. frenulum = attaches tongue to floor of cavity 9. 3 pairs of Salivary Glands secrete 1 – 1. 5 L of saliva a day p. H = 7; 99. 4 % water (0. 6 % ions and amylase which begins absorption of carbs. A. Parotid ( ear) B. Sublingual (under tongue) C. Submandibular (posterior to teeth--secretes Amylase)
10. Teeth perform Mastication = chewing ( which breaks down connective tissue of meat and fiber in plants a. dentin = like bone ( non-living) b. pulp cavity = blood and nerves c. root canal = narrow tunnels @ base/ root of tooth d. crown = visible part covered with enamel
Problems of the Oral Cavity 1. gingivitis = bacteria in gums 2. plaque = sticky matrix of food/ bacteria 3. tartar = hard calcified plaque 4. dental caries = cavities 5. root canal = removal of all bacteria in canal 6. impacted wisdom tooth = not enough room or out of place ** Floss daily to remove bacteria that a toothbrush can’t get to
4 Main Types of Teeth w/diff. functions 1. incisors = cut/ clip… in front 2. cuspids (canines) = tear and slash 3. bicuspids (premolars) = crush/ mash/ grind 4. molars = crush/ grind
Dental Succession 1. Deciduous = primary/ milk/ baby 20 2. Permanent = secondary/ adult 32 3. Third molars = wisdom teeth
On a white sheet of paper…. • Draw, color, label and title Fig. 15. 5 pg. 406– include the names of teeth from Fig. 15. 8 pg. 407 • Draw, color, label and title Fig. 15. 9 pg. 408 • Staple this paper to your Digestive Drawing from Friday after test (pg. 403)… due Wednesday!
