Ch 4 Development Of Face

Question 1

Facial development includes formation of

Answer 1

Primitive mouth
Mandibular arch
Maxillary process
Frontonasal process
Nose

Question 2

Facial development depends on 5 facial processes

Answer 2

Single frontonasal process 1
Paired maxillary process 2,3
Paired Mandibular process 4,5

Question 3

Most facial tissues develop by ___ of swellings on same surface of the embryo

Answer 3

Fusion

Question 4

Oropharyngeal membrane

Answer 4

Temporary membrane that consists of external ectoderm overlying endoderm

Apart of stomodeum and oral cavity formation

Question 5

Oropharyngeal membrane separates ___ from ____

Answer 5

Stomodeum from primitive pharynx

Question 6

Disintegration of Oropharyngeal membrane increases depth of ____ ____

Allows access from ____ ____ _____ to outside fluids

Answer 6

Primitive mouth

Internal primitive pharynx

Question 7

Stomodeum will give rise to ____ _____

Answer 7

Oral cavity

Question 8

Mandibular Arch and Lower Face Formation

2 Mandibular processes appear ___ to ___ ____

-Consist of a core of mesenchyme covered externally by ____ and internally by ____

-fuse at midline to form ______ ____

Answer 8

inferior, Primitive mouth
Ectoderm, endoderm
Mandibular arch

Question 9

Mandibular Arch and Lower Face Formation

_____ ____ is cartilage of Mandibular arch (___ brachial arch)

Mandibular arch gives rise to ___ ____ (1/3)
Including ___ ___, _____ (w/ teeth and associated tissue)

Answer 9

Meckels cartilage, first

Lower face
Lower lip, mandible

Question 10

Maxillary Process and Midface Formation

Maxillary processes form from increased growth of _____ ____

Maxillary processes will form the ____,
Including (6)

Answer 10

Mandibular arch

Midface
1.SIDE of upper lip
2.Cheeks
3. Secondary palate
4. Posterior portion of maxilla
5. Maxillary canines, posterior teeth and associated tissues
6. Zygomatic bones, portion of temporal bones

Question 11

Maxillary processes fuse with Mandibular arch to form ___

Answer 11

Labial commissures

Question 12

Frontonasal Process is

It gives rise to ___ ____ including (5)

Answer 12

Bulge of tissue in upper facial area

Upper face, including
Forehead
Bridge of nose
Primary palate
Nasal septum
All structures related to medial nasal processes

Question 13

Placodes are

Found at location of

Answer 13

Rounded areas of specialized thickened ectoderm

found at location of developing special sense organs

Question 14

3 placodes

Answer 14

Lens placode
Otic placode
Nasal placode

Question 15

Nasal pits are formed as

They develop into

Answer 15

A depression in center of each nasal placode

Nasal cavities

Question 16

Medial nasal processes fuse together EXTERNALLY to from (2)

Answer 16

Middle portion of nose
Center portion of upper lip and Philtrum

Question 17

Medial processes fuse together INTERNALLY and grow inferiorly on inside of ____ to form _____ _____

Answer 17

Stomodeum

Intermaxillary segment

Question 18

Intermaxillary segment forms (3)
(Medial nasal process fuse internally and grow inferiorly on inside of stomodeum)

Answer 18

Maxillary incisors and associated tissues

Primary palate

Nasal septum

Question 19

Lateral nasal processes form

Answer 19

Alae

Question 20

Fusion of lateral nasal, medial nasal and maxillary processes forms the

Answer 20

Nares (nostrils)

Question 21

The upper lip is formed from fusion of each ____ ____ with each ____ ____

Answer 21

Maxillary process

Medial nasal process

Question 22

Maxillary processes fuse with each lateral nasal processes to form _____ cord which developed to become _____ _____

Answer 22

Nasolacrimal

Nasolacrimal duct