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Flashcards in quiz on lecture 5 Deck (31)
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1
Q

formation of palate starts during fifth week of prenatal development within the embryonic period from two seperate embryonic structures

A

primary and secondary palate

2
Q

internal wedge that extends inferiorly and deep to nasal pits on inside of stomodeum

A

intermaxillary segment

3
Q

initially serves as a partial floor of nasal cavity and the nasal septum

A

intermaxillary segment

4
Q

intermaxillary segment was formed from

A

fusion of 2 medial nasal processes within the embryo

5
Q

the intermaxillary segment forms

A

the primary palate; which serves as a partial separation between the developing oral cavity and nasal cavities

6
Q

what could the primary palate also be known as?

A

primitive palate, globular process, premaxilla, median palatal process, intermaxillary segment

7
Q

the bilateral maxillary processes give rise to two palatal shelves

A

right and left lateral processes

8
Q

palatal shelf elevation occurs; palatal shelves were developing vertically do what?

A

flip up to move in horizontal direction

9
Q

the two lateral processes then do what

A

move medially toward each other fusing to form secondary palate

10
Q

the secondary palate will eventually form the what

A

posterior 2/3 of hard palate, maxillary canines and posterior teeth, posterior to incisive foramen, soft palate and uvula

11
Q

within the mucosa lining and deeper median palatine suture indicate line of fusion of palatal shelves

A

median palatine raphe

12
Q

the secondary palate will fuse with the primary palate; this forms the final palate during what week

A

12th week

13
Q

located at the junction of the primary palate and secondary palate meet; incisive papilla clinically over this

A

nasopalatine or incisive foramen

14
Q

a growth from the medial nasal processes also

A

nasal septum (like the primary palate)

15
Q

nasal septum =

A

chondrocytes

16
Q

what is formed by the first 4 branchial arches?

A

tongue

17
Q

arch one forms

A

body of tongue(ant. 2/3)

18
Q

arch 2, 3, ,4 forms

A

base of tongue

19
Q

what three parts are the body of tongue developed from

A

central tuberculum impar, and 2 lateral lingual swellings

20
Q

located in midline on floor of primitive pharynx

A

central tuberculum impar

21
Q

on each side of tuberculum impar

A

two lateral lingual swellings

22
Q

what are the lateral lingual swellings from?

A

growth of mesenchyme of 1st branchial arch

23
Q

line of fusion of 2 lateral lingual swellings

A

median lingual sulcus

24
Q

the body and base of tongue are separated by

A

terminal sulcus

25
Q

the base of the tongue is formed by the

A

copula overgrowing the 2nd branchial arch(hyoid arch)

26
Q

which 4 cranial nerves innervate the tongue

A

5,7,9,10

27
Q

terminal sulcus points back to a pit like depression

A

foramen secum

28
Q

from the foramen cecum arises cells

A

which migrate ventrally to form the thyroid

29
Q

epithelial duct that is attached from thyroid to tongue; cysts can occur here

A

thyroglossal duct

30
Q

worst cleft

A

have cleft lip with cleft palate

31
Q

mildest form of cleft

A

cleft uvula