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58 Cards in this Set

  • Front
  • Back
In 4th week of development, a series of _____ (vert. bars of tissue) form in _____.
arches; lateral & ventral aspects of pharyngeal wall
The __th & ___th arches are rudimentary & don't leave external surface markings.
5th & 6th
The ___ arch will degenerate & form no derivatives.
________ delineate the arches externally.
Pharyngeal grooves (shallow ectodermal grooves)
Pharyngeal grooves form in a _____ to ____ direction & not all at once.
cranial to caudal
The pharynx is continual posteriorly with the ______.
Inside the pharynx, ___ (how many?) endodermally-lined pouches are sent out _______.
4; laterally
The pouches meet the pharyngeal grooves, which have ____-____ projection.
outside to inside
The pharyngeal arches are separated by ____ & _____.
grooves & pouches
The arches lie ____ to respective pouch and membrane.
The 1st pharyngeal arch is also called the ______ arch.
mandibular--one of its derivatives is the mandible
The 2nd pharyngeal arch is also called the ______ arch.
hyoid arch
The pharyngeal arch has bars of cartilage in each arch (PA cart.) that gives rise to ______.
skeletal & fibrous structures in head & neck
In each pharyngeal arch, there's a mass of musculature that forms _____.
muscles of the head and neck
Each pharyngeal arch has its own nerve supply from _____.
a cranial nerve or its branch
What do the cranial nerves of the pharyngeal arches supply?
muscle, skin, & mucousa related to that particular arch
Each pharyngeal arch has its own artery that courses thru each arch (called ___).
aortic arch
Some of the aoritic arches of pharyngeal arches give rise to ________.
vessels in the adult
_________ are a strip of cells that develop along the length of the embryo.
Neural Crest Cells
Neural Crest Cells develop __(dors/vent) & __ (med/lat) to developing neural tube.
The neural tube gives rise to ____ & ____.
brain & spinal chord
What are some derivatives of neural tube?
all ganglia of ANS; medulla of adrenal gland; DRG of s.c; 1st 3 Pharyngeal Arches cartilages
The 1st pharyngeal arch is unique b/c bones develop as ____ or ____.
cartilage precursor (& later ossify) OR they ossify directly through mesenchyme
In the first pharyngeal arch, the ____ & ____ ossify directly through mesenchyme.
maxila & mandible bones
The stomadeum is the primitave _____ cavity.
The mandibular & maxillary prominances of 1st phary. arch bind the _______.
The mandibular & maxillary prominances are stuffed with _____.
The 1st arch cartilage & mandibular process is called ________.
Meckel's cartilage
The 1st part of the pharyngeal arch cartilage forms ____ of middle ear.
incus (middle bone)
The 1st cartilage (Meckel's) forms ______, while the rest of the cartilage degenerates.
malleus of middle ear ossicles
The mesenchyme around the cartilage of PA 1 ossifies to form _______.
The mandible & maxillary bone are formed directly from _____.
The ______ is NOT formed from Meckel's cartilage.
The cartilage of the maxillary process forms the ________.
The mesenchyme of the maxillary process forms ___, ___, & _____.
maxillary bone, zygomatic bone, & squamous portion of temporal bone
The 2nd pharyngeal arch forms ______ cartilage.
The 1st arch has ___ bones & ____ bones associated with it.
cartilage & membrane
The 2nd arch cartilages give rise to form ____, ___, ___, ____ (all in a line).
stapes, styloid process of skull, stylohyoid ligament, lesser horn&upper body of hyoid
The 3rd arch cartilage ossifies to form ___ & ____.
greater horn of the hyoid & lower part of body of hyoid
The 5th arch cartilage forms _______.
NOTHING--it regresses
The 4th & 6th arch cartilages form ______.
most of cartilage in larynx
The 1st arch musculature 1º gives rise to ____ muscles (chewing/mastication).
temporalis & masseter
The 2nd arch musculature forms main muscles of ____.
facial expression
The 3rd arch musculature only has 1 derivative:_______
stylopharyngeus muscle (elevates pharynx when we swallow)
The 4th arch musculature forms __________.
all muscles of pharynx except stylopharyngeus muscle
The 4th arch musculature also forms ______.
all muscles of soft palate w/one exception
The 6th arch musculature forms small intrinsic musc. of ___. What do these do?
larynx; regulate pitch of the voice
CN ___ serves the 1st arch.
V (trigeminal)
The 3 branches of CN V are ____, ____, & ____.
opthalmic; maxillary; mandibular
CN ____ grows into the 2nd arch.
VII (facial nerve)
CN ___ supplies arch 3.
IX (glossopharyngeal)
CN __ supplies the 4th & 6th pharyngeal arch.
The recurrent laryngeal supplies __ arch, while the superior & pharyngeal branches of vagus supply __.
6; 4
The ______ division of the CN V supplies mucosa of nasal cavity & hard palate.
The ______ division of the CN V supplies mucosa of oral cavity. Which part?
mandibular; 2/3 of tongue; floor of mouth (SENSORY)
CN VII supplies _____ on soft palate & on anterior 2/3 of tongue.
taste buds
The glossopharyngeal nerve has sensory component to ______ & ______.
posterior 1/3 of tongue & mucosa of wall of pharynx
The vagus nerve innervates the mucosa of the _____.