BIOL 115 Lecture Notes - Lecture 28: Adenoid, Periodontal Fiber, Soft Palate
Document Summary
Receives food and begins mechanical and chemical digestion. The roof of the mouth separates the nasal cavity from the oral cavity. Two parts: a bony hard palate and a soft palate. The soft palate is made of muscle; ends in the uvula. Tonsils in the back of the mouth on either side of the tongue. There is a single pharyngeal tonsil in the nasopharynx, commonly called the adenoids. Three pairs of salivary glands secrete saliva, which contains: Assists in mechanical breakdown, movement of food. Forms a bolus (mass of chewed food) and moves it toward the pharynx. 20 smaller deciduous (baby) teeth, 32 adult teeth. Crown the part of the tooth above the gum line. Dentin a thick layer of bonelike material. Periodontal membranes anchor the tooth to the jawbone. Occur when bacteria metabolize sugar and produce acids, which erode the teeth. Can be painful when it reaches the nerves of the pulp.
