Mouth, Pharynx, and Esophagus Flashcards Preview

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Flashcards in Mouth, Pharynx, and Esophagus Deck (29):
1

The oral/buccal cavity contains what structures?

*2 of them*

Teeth and Tongue

2

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

3

What is the Oral cavity bordered by?

4 structures

The Palate
The Lips
The Tongue
and Cheeks

4

What is the structure... that allows us to chew and breath at the same time... *at least allows for this to happen*

The palate

5

The space between the cheeks/lips and teeth

Vestibule

6

The area within the teeth and gums is the ______

oral cavity proper

7

Gingiva is another word for

Gums

8

______ is the *dangling* extension of the soft palate

Helps prevent food from entering the nasopharynx

Uvula

9

This structure helps move food around in the mouth during chewing...

*aids in forming food into a bolus for swallowing*

The tongue

10

What kind of muscles allow the tongue to *CHANGE SHAPE*

Not attached to bone

Intrinsic muscles

11

What kind of muscles allow the tongue to Change position *its location*

Attached to bone

Extrinsic muscles

12

The surface of the tongue is covered with _____ ______, which contain taste buds and increase surface area of tongue.

Lingual Papillae

13

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**

14

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

15

This structure connects pharynx to the stomach

Esophagus

16

What nervous system is responsible for the peristaltic movement of smooth muscle?

ANS

17

________ is the opening in the diaphragm (breathing muscle) where esophagus passes through

Esophageal Hiatus

18

________ is the muscle on the inferior end of esophagus that prevents back flow of stomach content

Gastro-esophageal sphincter...

normally in a contract state

19

________ refers to the opening of the esophagus into the STOMACH

Cardiac Orifice

20

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

21

_____ interior stomach folds allowing stomach to expand to accommodate large meals

Rugae

22

_______ ________ are obliquely oriented muscles which help in mechanical digestion.

Muscularis externa

23

What are the 4 parts of the stomach?

Cardia (Cardiac Region)
Fundus
Body
Pylorus

24

Gastric Glands are primarily responsible for what kind of digestion?

a) Mechanical
b) Chemical
c) Mixed
d) automatic

B chemical.... lul

25

gastric glands contain 4 types of secretory cells... what are they...

What do each cell type secrete respectively?

Parietal Cells:
*intrinsic factor & HCl*

Chief Cells:
*secrete pepsinogen*

G Cells:
*secrete Gastrin*

Mucous cells:
*secrete Mucin*

26

Digestion function consist of 3 phases...

Cephalic
Gastric
& Intestinal

*briefly describe each phase

~Cephalic phase~:
Consist of physical stimulation that result in a reflex, causing gastric motility and secretion

~Gastric Phase~:
Consist of digestion in stomach...

~Intestinal phase~:
begins with movement of chyme into the duodenum

27

What chemicals stimulate stretch of the stomach

Acetylcholine

Gastrin

28

(define it) Chyme

Liquefied digested food, which is transferred from stomach to the duodenum

29

Cells of the duodenum release what chemicals?

Secretin and Cholecystokinin (CCK)

*these guys inhibit secretion and motility of stomach*

*stimulate the production & release of pancreatic juice and bile*

* stimulate contraction of the gall bladder *