Mouth, Pharynx, and Esophagus Flashcards
(29 cards)
The oral/buccal cavity contains what structures?
2 of them
Teeth and Tongue
The Functions of the Oral Cavity consist of what?
4 general functions this question is kinda eh
1) Analysis (of food)
2) Mechanical digestion, mastication (chewing)
3) lubrication with enzymes, deglutition
4) limited chemical digestion
What is the Oral cavity bordered by?
4 structures
The Palate
The Lips
The Tongue
and Cheeks
What is the structure… that allows us to chew and breath at the same time… at least allows for this to happen
The palate
The space between the cheeks/lips and teeth
Vestibule
The area within the teeth and gums is the ______
oral cavity proper
Gingiva is another word for
Gums
______ is the dangling extension of the soft palate
Helps prevent food from entering the nasopharynx
Uvula
This structure helps move food around in the mouth during chewing…
aids in forming food into a bolus for swallowing
The tongue
What kind of muscles allow the tongue to CHANGE SHAPE
Not attached to bone
Intrinsic muscles
What kind of muscles allow the tongue to Change position its location
Attached to bone
Extrinsic muscles
The surface of the tongue is covered with _____ ______, which contain taste buds and increase surface area of tongue.
Lingual Papillae
What are the 3 (extrinsic) salivary glands of the mouth?
(Bonus) Where do each gland empty into respectively?
Parotid Glands:
which produce thin water saliva…
empty into the vestibule by the second upper molar
Sublingual Glands:
produce thicker saliva, higher mucin…
they empty into the lingual frenulum
Submandibular Glands: mixture of serous cells and mucous cells
Empty into the mouth on either side of lingual frenulum
What are the 2 main functions of salivary glands?
don’t overthink it
1) Lubricate food..
* saliva is 97-99% water… and contains protein called mucin (main ingredient to mucus)
2) Begin Chemical digestion
This structure connects pharynx to the stomach
Esophagus
What nervous system is responsible for the peristaltic movement of smooth muscle?
ANS
________ is the opening in the diaphragm (breathing muscle) where esophagus passes through
Esophageal Hiatus
________ is the muscle on the inferior end of esophagus that prevents back flow of stomach content
Gastro-esophageal sphincter…
normally in a contract state
________ refers to the opening of the esophagus into the STOMACH
Cardiac Orifice
Where does the production of the “Intrinsic factor” occur? What does it allow the absorption of?
Intrinsic factor occurs in the Stomach…
Which is required for absorption of vitamin B12
_____ interior stomach folds allowing stomach to expand to accommodate large meals
Rugae
_______ ________ are obliquely oriented muscles which help in mechanical digestion.
Muscularis externa
What are the 4 parts of the stomach?
Cardia (Cardiac Region)
Fundus
Body
Pylorus
Gastric Glands are primarily responsible for what kind of digestion?
a) Mechanical
b) Chemical
c) Mixed
d) automatic
B chemical…. lul
