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27 terms

8-a&p, oral cavity, teeth

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gut, alimentary canal, or gastrointestinal tract
approx 30 feet of a continuous muscular tube stretching between the mouth and anus
organs of the digestive system
oral cavity, pharynx, esophagus, stomach, small intestine and colon
accessory organs that participate in digestion but not part of the GI tract
liver, pancreas, gallbladder and salivary glands
functions of the digestive system
digest food, absorb nutrients and eliminate waste
teeth
structures in the mouth that mechanically break up food into smaller pieces during chewing
tongue
muscle that moves food within the mouth and mixes it with saliva
saliva
contains digestive enzymens to break down carbohydrates and slippery lubricants to make food easier to swallow
taste buds
found on the surface of the tongue distinguishes the bitter, sweet, sour and salty flavors of food
palate
the roof of the mouth, subdivided into the hard palate and the soft palate
hard palate
bony anterior portion
soft palate
flexible posterior portion
uvula
hangs down from the posterior edge of the soft palate; has a role in speech production; is the location of the gag reflex
cheeks
lateral walls of the oral cavity
lips
the anterior opening of the oral cavity
gums, gingiva
combine with connective tissue to cover the jaw bone and seal off the teeth in their bony sockets
cutting teeth in the front of the mouth
incisors, cuspids, canines; bite, tear and cut food into small pieces
grinding teeth in the back of the mouth
bicuspids, premolars, molars; grind and crush food into even finer pieces
crown
part of the tooth visible above the gum line
root
part of the tooth below the gum line
cementum and periodontal ligaments
anchors the root in the bony socket of the jaw
enamel
covers the crown of the tooth; hardest substance in the body
dentin
substance that makes up the main bulk of the tooth, under the enamel
pulp cavity
hollow interior of the crown
root canal
hollow interior of the root
pulp cavity and root canal contain
soft tissue made up of blood vessels, nerves and lymph vessels
deciduous teeth
baby teeth, 20 total
permanent teeth
32 total