M10S2: Oral Cavity

Question 1

Oral cavity is the first part of the digestive tract and consists of what 2 parts

Answer 1

-the vestibule, which is the space between the cheeks and lips and the gums and teeth
-the oral cavity proper, which includes the other areas of the mouth
*refer to goodnotes

Question 2

What are the 6 anatomy structures of the oral cavity

Answer 2

-palate
-tongue
-salivary glands
-teeth
-pharynx
-tonsils
*refer to goodnotes

Question 3

Palate

Answer 3

-makes up superior boarder of oral cavity
-divided into hard palate (bone) and soft palate (muscle)
-posterior extension of soft plate = uvula
*refer to goodnotes

Question 4

Tongue

Answer 4

-muscle associated with speech, taste, and the mechanical manipulation of food
-made up of muscles that control shape of tongue itself (intrinsic muscles) and muscles that move tongue during chewing and speech (extrinsic muscles)
-on the inferior surface of tongue = frenulum which anchors tongue to floor of mouth
(Newborns can’t breastfeed = tongue tie as frenulum too short so restrict tongue movement)

Papillae on tongue
-superior and lateral surfaces of tongue covered in this
-projections or bumps on tongue
-4 types: some containing taste buds allowing human sense of gustation
(When licked by cat, sandpaper feel caused by papillae)
*refer to goodnotes

Question 5

Salivary glands

Answer 5

-secrete digestive enzymes and muscles to help break down food while chewing (mastication)
-3 major clanks with different secretions

Parotid
-secretes serous (watery) fluid and located anterior and inferior to external ear opening

Submandibular
-secretes serous and mucous (viscous) fluid and inferior to mandible

Sublingual
-secretes mucus and inferior to tongue
*refer to goodnotes

Question 6

Teeth

Answer 6

-humans have 2 sets: first deciduous teeth (baby teeth) and then permanent teeth
-important for mechanical digestion of food

Deciduous
-consist of 2 incisors, 1 canine (cuspid) and 2 molars in each quadrant of the jaw (ie. upper right quadrant)
-total 20 teeth in whole mouth

Permanent
-consists of 2 incisors, 1 canine (cuspid), 2 premolars (bicuspid) and 3 molars in each quadrant of the jaw
-total 32 teeth in whole mouth
(2 Paris of third molars in permanent set known as wisdom teeth)
*refer to goodnotes

Question 7

Pharynx

Answer 7

-both part of digestive system and conducting portion of respiratory system
*refer to goodnotes

Question 8

Tonsils

Answer 8

-collections of lymphoid tissues found in area of pharynx
-play role in immune system
3 tonsils
1. Palatine tonsils
2. Pharyngeal tonsils
3. Lingual tonsils
*refer to goodnotes