A&P Quiz 7

  1. Median Septum
    • Separates the nasal cavities
    • Cartilage at the Front
    • Vomer: bone at the back
  2. Frontal Sinus
    Located above the roof of the nasal cavity
  3. Boundaries of the Nasal Cavity
    • Roof is the base of the skull
    • Floor is the hard palate
    • Frontal is the nostril/nairs
  4. Tubes of the Nasal Cavity
    • 2 tubes that resemble a labyrinth
    • Air is warmed, cleaned and humidified for the lungs
    • Nasal hair prevents fine particles from entering the lungs
    • Lined with mucus membrane that cleans and humidifies. Capable of removing almost all dust and bacteria
  5. Cilia
    moves dust particles in the nose back to swallow
  6. Lysozyme Enzyme
    • Keeps posterior part of the nasal cavity nearly sterile
    • Kills airborne bacteria
  7. Hard Palate
    • Floor of the nasal cavity
    • Roof of the mouth 
    • Formed in developing fetus by 8th week
    • The 2 palatine processes and nasal septum come together 
    • Formed by maxilla and Palatine Bone
  8. Maxilla
    Contains alveolar ridge/process, palatine process, and premaxilla
  9. Premaxilla
    • Contains upper incisors (2 front teeth and 2 next; central and lateral incisors)
    • Fuses with maxillary arch at 8th week after conception
    • *If not fused, Cleft lip occurs
  10. Cleft Lip
    • Unilateral: One side
    • Bilateral: Both sides
    • Always occurs between lateral incisors and cuspid/canine
    • Can involve just the soft tissue of the lip or soft tissue and premaxilla up to incisive foramen
  11. Incisive Foramen
    Opening in the tooth where nerves come through
  12. Palatine Bone
    • Posterior to maxilla 
    • Velum attaches to it
  13. Tooth
    • Living structure
    • Composed of hard and soft layer
    • Enamel: outer most layer; hardest substance in the body
  14. Dentin
    • layer under enamel 
    • Forms bulk of tooth 
    • Highly elastic
    • Acts as supportive Structure 
    • Has nerve endings that make teeth sensitive to hot and cold
    • Produced by Dental Pulp
  15. Dental Pulp
    • Central Portion of tooth 
    • Soft Tissue
    • Contains nerve fibers that transmit pain signals
  16. Cementum
    • Covers the part of the tooth that is exposed above the gum line
    • Thin layer of bone
    • Holds tooth in socket
  17. Periodontal Ligament
    Anchors the tooth
  18. Crown
    • Visible portion of the tooth 
    • Makes up 1/3 of the tooth
  19. Neck of the Tooth
    Area where the crown meets with the root
  20. Deciduous Teeth (Baby/Milk/Primary Teeth)
    • erupt from 6 - 24 months 
    • Central incisors erupt first 
    • Lost between 6 - 12 months
    • What falls out first grows back first 
    • 20 Baby teeth; 32 Permanent
  21. Quadrants
    • 2 on top and bottom divided by central incisors
    • Deciduous teeth quadrants contain 1 central and lateral incisor and cuspid and 2 molars
  22. Permanent Teeth
    • Erupt of a span of 6-17 years beginning at 6 years old
    • Starts with central incisors
    • Ends with 3rd molar (wisdom teeth)
  23. Occlusion
    Contact between the upper and lower teeth
  24. Malocclusion
    Abnormality of Occlusion
  25. 3 Classes of Occlusion
    • Class I Occlusion: proper alignment of dental arches (one or two off is ok)
    • Class II Malocclusion: Upper dental arch protrudes over lower dental arch (overbite)
    • Class III Malocclusion: Lower dental arch protrudes past upper dental arch (underbite) 

    *Treatments are not necessary unless they impede function
  26. Boundaries of Oral Cavity
    • Back: Posterior Faucial Pillar 
    • Front: Incisors and Lips 
    • Side Walls: Cheeks and teeth 
    • Floor: Tongue
  27. Buccinator
    • Major muscle of the cheek
    • originates at pterygomandibular ligament 
    • Inserts into lips 
    • Used for mastication and spreading the lips
  28. Buccal Cavity
    Space between the cheek and the teeth
  29. Orbicular Oris
    • Muscle of the lips 
    • Oval ring that encircles the mouth
    • Functions as sphincter muscle to purse the lips
  30. Philtrum
    • Indentation that runs from the lower part of the nose to cupid's bow in the upper part of the lips 
    • valley between nose and lip
    • Cleft lip philtrum disconnected from the lip
  31. Risorius Muscle
    • Just below the surface of the skin 
    • Small
    • Assists in spreading the lips
  32. Tongue
    • Floor of the oral cavity 
    • Used to move food in oral cavity to chew or swallow
    • Also known as Glossal 
    • Intrinsic Muscles: responsible for fine motor movements (clover shape)
    • Extrinsic Muscles: responsible for larger motor movements
  33. Sections of the Tongue
    • Tip: can go between teeth 
    • Blade: what arches against the alveolar ridge 
    • Dorsum: front part arches against the hard palate; back part against the soft palate
    • Root: base of the tongue, not used for speech sounds
Card Set
A&P Quiz 7
A&P Quiz 7