oral embryology: craniofacial development

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45 Terms

1
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mid week 3-end week 4

when does anteerio-posterior folding begin

2
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neurocranium

surrounds brain composed of cartilages and placodes

3
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dermocranium

the part of the skull that forms a protective shell around the chondrocranium

4
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chondrocranium

the cartilaginous part of the skull that supports the brain and forms the base of the skull.

5
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viscerocranium

the portion of the skull that forms the facial skeleton, including the jaw and other structures.

6
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ectomesenchyme

derived from NCCs, develops into dental and skeletal tissues of oral cavity, responsible for early development of face

7
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mesenchyme

a type of embryonic connective tissue that develops into various types of tissues including bones and cartilage.

8
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cranial NCCs fron MB (midbrain) and rhombomeres (Rhb) 1 and 2

provide material for bone and cartilage of the face and 1st branchial arch

9
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NCCs from Rhbs 4,6,and 8

provide material for 2nd-4th branchial arches

10
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FGF, BMP

growth factors that influencee anterior head development

11
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frontal,maxillary,stomodeum, mandibular, heart

processes that define the embryonic mouth

12
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odontogenic epithelium

the epithelial tissue involved in tooth development, originating from the ectoderm.

13
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week 4

when does odontogenic epithelium develop

14
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week 4

when does the buccopharyngeal membrane rupture

15
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frontal process

(A)

<p>(A)</p>
16
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maxillary process

(B)

<p>(B)</p>
17
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mandibular arch (1st)

(C)

<p>(C)</p>
18
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mandibular process

(D)

<p>(D)</p>
19
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hyoid arch (2nd)

(E)

<p>(E)</p>
20
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branchial arch (3rd)

(F)

<p>(F)</p>
21
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stomadeum

(X)

<p>(X)</p>
22
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end of week 4 (28 days)

olfactory placodes (nasal placodes) begin to develop

23
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placodes

thickening of ectoderm that forms sensory organs

24
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nasal pit formation

sign of week 5 development

25
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medial nasal process

give rise to mid-portion of both nose and upper lip and premaxilla and primary palatee

26
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primary choanae (interenal nasal opening)

what is a sign of week 6 development

27
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trabecular cartilages (NCC)

responsible fot development of ethmoid bone

28
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fusing of trabecular cartilage to midline of ethmoid

essential for fusion of facial processes in the midline

29
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week 4

what week of development?

<p>what week of development?</p>
30
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maxillary process

identify region marked by X

<p>identify region marked by X</p>
31
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X:lateral nasal process, Y:medial nasal process

label X and Y

<p>label X and Y </p>
32
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odontogenic epithelium

on the margins of processes surrounding the stomodeum develops into teeth

33
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medial nasal process

forms into primary palate and premaxilla

34
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maxillary process

forma secondary palate

35
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7.5 weeks

tongue lowers to allow the fusion of the palatal shelves

36
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week 8

palatal shelves begin to merge

37
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week 9

palate shelves fuse with each other and the nasal septum

38
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late week 4 (no nose)

what stage of development

<p>what stage of development </p>
39
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week 5 (nasal pit present)

what stage of development?

<p>what stage of development?</p>
40
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week 5 (nose and no choanae)

stage of development?

<p>stage of development?</p>
41
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week 6 (primary choanae present

what stage?

<p>what stage?</p>
42
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mid week 6 (tongue in way of palatal shelves)

what stage?

<p>what stage?</p>
43
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mid week 6 (tongue not retracted)

what stage?

<p>what stage?</p>
44
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week 8 (palate begins to merge)

knowt flashcard image
45
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late week 9 (palatal shelves joined but fusion incomplete)

what stage?

<p>what stage?</p>