Developmental Anatomy

Front 1

which pharangyeal arch is present only shortly and has no adult derivative?

Back 1

5th

Front 2

what week do the pharyngeal arches usually appear?

Back 2

5th

Front 3

The first arch surrounds the

Back 3

Common carotid & root of internal carotid arteries
�

Front 4

Each pharyngeal arch consists of which three features?

Back 4

ectoderm, endoderm, mesenchemyl core

Front 5

The mesenchymal core contains a(n)?
MAC n cheese

Back 5

muscle component
cranial nerve
aortic arch artery
cartilaginous ro

Front 6

what nerve comes from the first arch?

Back 6

trigemnial nerve

Front 7

what nerve comes from the second arch?

Back 7

facial nerve

Front 8

what nerve comes from the third arch?

Back 8

glossopharangeal nerve

Front 9

what nerve comes from from the 4th and 6th arches

Back 9

vagus

Front 10

what artery is derived from the second arch?

Back 10

Corticotympanic artery
�

Front 11

what artery is derived from third arch?

Back 11

Common carotid & root of internal carotid arteries
�

Front 12

what is the fate of the first pouch?

Back 12

auditory tube tympanic membrane

Front 13

Pharyngeal pouches are

Back 13

out-pouchings of the pharyngeal endoderm between arches internally

Front 14

Pharyngeal clefts are

Back 14

external grooves between arches

Front 15

Pharyngeal membrane is

Back 15

membrane separating clefts and pouches

Front 16

The 1st cleft 


Back 16

external auditory meatus

Front 17

The 1st pharyngeal membrane

Back 17

tympanic membrane

Front 18

Bones of the skull are formed by?

Back 18

Intramembranous ossification (dermocranium)
Bone forms from mesenchyme directly that ossifies
Endochondral ossification (chondrocranium)

Front 19

what Develops by intramembranous ossification from mesenchyme that develops from paraxial mesoderm and neural crest cells (NCC).

Back 19

dermocranium

Front 20

what gives rise to
Cranial vault (calvaria)
Many facial bones?

Back 20

dermocranium

Front 21

what forms base of skull and bones around sensory organs

Back 21

chondormchranium

Front 22

bones, dentin, dermis of face are derived from

Back 22

Neural crest cells

Front 23

most of the cranial base and part of the cranial vault are derived from

Back 23

Paraxial mesoderm (somitomeres and somites)

Front 24

skeletal muscles of the craniofacial region
dermis and other connective tissues, dorsal region of head are derived from the

Back 24

Paraxial mesoderm (somitomeres and somites)

Front 25

the meninges caudal to the prosencephalon (forebrain) are derived from the

Back 25

Paraxial mesoderm (somitomeres and somites)?

Front 26

Neurocranium grows up to

Back 26

grows up to age 16
most rapid brain growth in first two years

Front 27

Facial cranium grows up to

Back 27

Growth coincides with
eruption of teeth
development and growth of the paranasal sinuses

Front 28

Fontanelles are?

Back 28

Membranous gaps where sutures meet

Front 29

Palpating fontanelles provides information about?
(think dig)

Back 29

Degree of hydration
Intracranial pressure
Growth progress

Front 30

Growth of the calvarium is allowed by the?

Back 30

fontanelles and sutures

Front 31

fontanelles normally close by?

Back 31

3 months and 2 years

Front 32

fontanelles closing at 3 months signifies?

Back 32

lambda and pterion

Front 33

frontalles closing by 2 months signifies?

Back 33

asterion and bregma

Front 34

Sutures normally close by?

Back 34

8 years or adult life

Front 35

the face develops from?

Back 35

five facial primordia

Front 36

when do these primordia normally develop?

Back 36

4 weeks

Front 37

what is the stomodeum?

Back 37

Primitive oral cavity
Lined by ectoderm
Separated from pharynx by oropharyngeal membrane

Front 38

Medial nasal prominences grow?

Back 38

medially and cadully and from the intermaxillary processes

Front 39

maxillary promincees grow?

Back 39

medially and form primary palate

Front 40

when is the single nasal cavity and how?

Back 40

Week 7
primary palate anteriorly
a thin oronasal membrane posteriorly

Front 41

Primitive choana forms?

Back 41

as a result of the breakdown of the oronasal membrane

Front 42

palatine shellves fuse with?

Back 42

with each other
with primary palate
Marked by incisive foramen

Front 43

when do palatine shelves fuse?

Back 43

week 10

Front 44

when do palatine shelves form?

Back 44

week 7

Front 45

The SECONDARY PALATE gives rise to?
�

Back 45

hard palate
soft palate

Front 46

The intermaxillary segment forms the
�

Back 46

Philtrum
Premaxilla
Maxillary alveolar process with incisors
PRIMARY PALATE

Front 47

development of paranal sinuses are from the?

Back 47

invaginations of nasal cavity
�

Front 48

Growth of the sinuses contribute significantly to ?

Back 48

growth of facial skeleton after birth
�

Front 49

Maxillary and ethmoidal sinsues

Back 49

Develop during 3rd and 5th fetal months, respectively
Complete growth by puberty

Front 50

frontal sinsues develop?

Back 50

in year 5 and 6

Front 51

when does the tongue develop?

Back 51

Starts late in Week 4 from a series of thickenings on the floor of the pharynx
�

Front 52

Mucosal covering develop from?
�

Back 52

pharanygeal arches

Front 53

where do muscles of the tonuge originate from?

Back 53

occipital somites
�

Front 54

As the thyroid descends?
�

Back 54

it remains connected to the base of the pharynx by the thyroglossal duct ..

Front 55

Salviary gland development (glandular component) is dependent on?

Back 55

is dependent on epithelial/mesenchymal transformation (EMT).
�

Front 56

Connective tissue component derives from what type of cells?
�

Back 56

neural crest cells