GA2 - pharyngeal apparatus Flashcards
pharyngeal ___: mesenchymal bars of tissue
arches
pharyngeal ___: inside of the embryo
pouches
pharyngeal pounches are lined by ___
endoderm
pharyngeal ____: outside of the embryo
grooves
pharyngeal grooves are lined by ___
ectoderm
pharyngeal pouches and grooves are in between the ___
arches
pharyngeal ___ are where the grooves and pouches meet
membranes
pharyngeal membranes contain both ___ and ___
endoderm
ectoderm
at 24 days, only arch ___ and __ are present
1
2
at 26 days arches ___ through ___ are present
1-3
at day 28, arches ___ through __ are present
1-4
typical pharyngeal arch consists of 4 things
aortic arch
cartilaginous rod
muscular component
nerve
aortic arch is an artery arising from the ___ ___ of the primordial heart
truncus arteriosus
cartilaginous rod forms the ___ of the arch
skeleton
muscular component gives rise to muscles of the ___ and ___
head and neck
nerve of the pharyngeal arch supplies the ___ and __ derived from the arch
mucosa
muscles
pharyngeal and branchial arches appear early in the ___ week of development
4th
pharyngeal arches consist of __ of mesenchymal tissue
bars
pharyngeal arches are involved in the formation of the __ and also the __
neck
face
at the end of the 4th week, the center of the face is formed by the ____
stomodeum
stomodeum is the future ___
mouth
stomodeum has a membrane covering called the ___ membrane
oropharyngeal
by 4.5 weeks, __ mesenchymal prominences can be recognized
5
the 5 mesenchymal prominences that are present at 4.5 weeks are:
mandibular prominences (2) maxillary prominences (2) frontonasal prominance (1)
the mesoderm of the arches give rise to the ___ of the face and neck
musculature
2st pharyngeal arch gives rise to the ___ and ___ prominences
maxillary
mandibular
first pharyngeal arch gives rise to 5 bones and part of another
malleus incus mandible maxilla zygomatic part of temporal
5 muscles derived from the 1st pharyngeal arch
muscles of mastication mylohyoid ant belly of digastric tensor veli palatini tensor tympani
innervation to the muscle of the 1st pharyngeal arch
mandibular division of trigeminal n
2 ligaments from the 1st pharyngeal arch
ant lig of malleus
sphenomandibular lig
1 nerve from the 1st pharyngeal arch
mandibular division of the trigeminal
mandibular division of the trigeminal contains what fiber?
SVE
4 bones of the 2nd pharyngeal arch
stapes
styloid process
lesser horn of hyoid
upper portion of body of hyoid
4 muscles from the 2nd pharyngeal arch
muscles of facial expression
post digastric
stylohyoid
stapdius
what nerve innervates the muscles from the 2nd pharyngeal arch
facial nerve
what fiber does the facial nerve carry
SVE
what nerve is derived from the 2nd pharyngeal arch
facial
2 bones from the 3rd pharyngeal arch
greater horn of hyoid
lower portion of the body of they hyoid