LEC 16 BIOL 431
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1
What is the oral/Buccal cavity made up of?
the cheeks, hard/soft palate, and tongue
2
What are the 2 parts of the check from the lateral wall?
Muscular core
Skin
Skin
3
What is the name of the muscular core that forms the lips? Function?
Orbicularis oris
Function = purse the lips and helps keep food controlled during chewing
Function = purse the lips and helps keep food controlled during chewing
4
What is the muscular core that forms the cheeks? function?
Buccinator
Function = assist to control food
Function = assist to control food
5
What are the3 layers of skin in the cheek and lips?
Extrenal = keratinized stratus epithelium (KSE)
internal = non KSE
Transitonal = non KSE
internal = non KSE
Transitonal = non KSE
6
What attaches the lips to the gums?
inferior and superior labial frenulum
7
What is the hard palate composed of and its function?
Palatine bone
Palatine process of the maxillae
Function = provide rigid surface for food to be pushed against
Palatine process of the maxillae
Function = provide rigid surface for food to be pushed against
8
What is the soft palate composed of and what is is function?
Comp of skeletal nuscle and uvula
Function = blocking off nasopharynx during swallowing
Function = blocking off nasopharynx during swallowing
9
What are the 2 arches that coming of the soft palate and what do they form?
Anterior = palatoglossal arches
Posterior = palatopharyngeal arches
Form border of Fauces
Fauces = area where palatine tonsils are
Posterior = palatopharyngeal arches
Form border of Fauces
Fauces = area where palatine tonsils are
10
What are the 2 muscles of the tongue and how is the tongue secured?
Intrinsic muscle - allows to shape
Extrensic muscle - allow extensions and retraction / side to side movement
Secure by Lingual frenulum which restricts posterior movement
Extrensic muscle - allow extensions and retraction / side to side movement
Secure by Lingual frenulum which restricts posterior movement
11
What are the 3 lingual papaillae ?
Filiform - move food
fungiform - vascular core and taste receptors
Vallate - taste receptors
fungiform - vascular core and taste receptors
Vallate - taste receptors
12
How are the salivary glands controlled ?
Mainly by parasympathetic NS
chemoreceptors in mouth signal the pons/ medulla which sends a signal down facial (VII) and glossopharyneal (IX) nerves to salivary gland
chemoreceptors in mouth signal the pons/ medulla which sends a signal down facial (VII) and glossopharyneal (IX) nerves to salivary gland
13
What are some functions of the Salivary glands?
Produce Saliva that is slightly acidic (6.75-7.00) containing salivary amylase to break down starch and lingual lipase that gets activated in the stomach to break down lipids
1000-1500 ml/day produced
1000-1500 ml/day produced
14
What are the 3 groups of glands?
1. Paratoid
2. submandibular
3.sublingual
2. submandibular
3.sublingual
15
What are the 2 sets of teeth and what do they consist of?
1. Deciuous = grow (2-6 YRS OF AGE), lose (6-12 yrs)
total = 20 = 2 incisors, 1 canine, 2 molar/ per quadrant
2. Suucedaneous = grow (6-12 yrs)
Total = 32 = 2 incisors, 1 canine, 2 premolar, 3 molar
total = 20 = 2 incisors, 1 canine, 2 molar/ per quadrant
2. Suucedaneous = grow (6-12 yrs)
Total = 32 = 2 incisors, 1 canine, 2 premolar, 3 molar
16
What is the shape and function of the incisors, canines and premolars/molars?
Incisors = chisel shaped for cutting
Canines = fanglike for puncturing and tearing
Premolar/molars = wide with multiple edges
Canines = fanglike for puncturing and tearing
Premolar/molars = wide with multiple edges
17
How are the teeth numbered ?
18
What are the 4 layers of the esophagus?
1. mucosa
2. submucosa
3. muscular layer
4. Adventia
2. submucosa
3. muscular layer
4. Adventia
19
What is gastroesophgeal reflu disease?
when acid is pushed through the lower gastriesophogeal sphincter
AKA heartburn
AKA heartburn
20
What controls the paristalsis part of swallowing
MEdulla
21
What is the capacity and 4 regions of the stomach?
cap = 1 1/2 quarts
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