Development of Face and Oral Cavity

Question 1

Forebrain grows rostrally (toward Oral Cavity) to overhang _____ and ______

Answer 1

Buccopharyngeal Membrane

Primitive Heart

Question 2

______ induce formation of neural plate within ectoderm

Answer 2

Mesoderm cells

Question 3

Neural Crest Cells develop from

Answer 3

Lateral margins of Neural Plate

Question 4

Neural Crest Cells are source of

Answer 4

Ectomesenchyme for Head and Neck (Dentin, Meninges, Pharyngeal Arches)

Question 5

In CT of head NCC develop into

Answer 5

Fibroblasts and Pericytes

Question 6

At end of NCC migration, they attach to neural tube and form sensory ganglia of _________

Answer 6

CN 5 (Trigeminal), 7 (Facial), 9 (Glossopharyngeal) 10 (Vagus)

Question 7

Pharyngeal lining is

Answer 7

Endoderm

Question 8

Epithelium of Stomadeum and Rathke’s pouch (adenohypophysis) is

Answer 8

Ectoderm

Question 9

Organs behind Buccopharyngeal membrane are _____ while organs anterior are ______

Answer 9

Endoderm

Ectoderm

Question 10

During 4th week, mesenchymal growth begins for _______

Answer 10

Mandibular, Maxilla, and Nasal Processes

Question 11

1st indication of nasal swelling is the ______ which sinks into mesenchyme forming the ______

Answer 11

Nasal Placode

Nasal Pit

Question 12

During the 5th week lateral and medial nasal swellings ______

Answer 12

Grow to form a Nasal Pit

Question 13

Medial swellings of the nose form:

Answer 13

Middle of Nose
Philtrum
Intermaxillary bone
Entire primary palate

Question 14

Formation of the face arises from

Answer 14

Mandibular and Maxillary Processes

Lateral and Medial Nasal swellings

Question 15

The ______ is formed between lateral nasal swellings and maxillary process

Answer 15

Nasolacrimal Duct

Question 16

Primary Palate formation occurs during ______ and is a result of _______

Answer 16

5-6th week

Fusion of medial nasal and frontonasal processes

Question 17

Three outgrowths appear in oral cavity:

Answer 17

Nasal Septum (downward from frontonasal process)
2 Palatal Shelves

Question 18

After tongue is withdrawn, the palatal shelves _______

Answer 18

Elevate and fuse with each other and the primary palate (will separate the oral from nasal cavity)

Question 19

The Nasal Cavity is formed from fusion of ______ with ______

Answer 19

Palatal shelves

Nasal Septum

Question 20

Cleft Lip is a result of lack of fusion between _____ and ____

Answer 20

Maxillary Prominence

Median Nasal Prominence

Question 21

Anterior Palate Cleft is result of lack of fusion between ______ and ______

Answer 21

Lateral Palatal Shelf

Primary Palate

Question 22

Secondary Palate Cleft is result of lack of fusion between

Answer 22

Lateral Palatal Shelf

Nasal Septum

Question 23

Tongue development occurs which Pharyngeal Arches

Answer 23

1st, 2nd, and 3rd

Question 24

During tongue development, the 1st pharyngeal arch forms

Answer 24

Anterior 2/3 Tongue from Ectoderm

Two lateral lingual prominences & Central prominence

Question 25

During tongue development, the 2nd and 3rd pharyngeal arch forms

Answer 25

Posterior 1/3 Tongue from Endoderm (3rd overgrows 2nd)

Middle Hypobranchial Eminence

Question 26

The Thyroid develops in gut as invagination between _____ and _______ at _______

Answer 26

Tuberculum Impar and Cupola

Foramen Caecum

Question 27

During week 7 the thyroid lies at level of ______ after passing ventral to hyoid

Answer 27

Laryngeal Primordia