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28 Cards in this Set

  • Front
  • Back
when does formation of branchial arches occur
D23-27
formation and folding of 1st branchial arch results in which 2 arches
maxillary and mandibular
5th branchial arch is absent T/F
There is no external 6th branchial archarch T/F
T
T
3 sxs within the branchial arches
1) aortic arches
2) branchiaomeric mesoderm
3) cranial nerves
Fate of aortic arches 1 & 2
degenerate
Fate of aortic arch 3
internal carotid artery
Fate of aortic arch 4
right subclavian vein and arch of aorta
Fate of aortic arch 6
pulmonary aa
what is the branchiomeric mesoderm
cartilaginous and muscular elements
fate of BM arch 1
mm of mastication
fate of BM arch 2
mm of facial expression
fate of BM arch 3
stylopharyngeus M
fate of BM arch 4/6
mm of pharynx & larynx
cranial nn in arch 1
trigeminal (V)
cranial nn in arch 2
facial (7)
cranial nn in arch 3
glossopharyngeal (IX)
cranial nn in arch 4/6
vagus (X)
branchial groove between maxillary and mandibular parts of 1st branchial arch
stomadeum (embryoinic mouth) opens on D26
branchial groove 1
external auditory meatus
Fate of Branchial arch 2
2nd (hyoid arch) grows over 3rd & 4th arches to form cervical sinus, which dissappears (occasionally forms cyst)
Pharyngeal pouch 1
middle ear and auditory tube
PP 2
Palatine tonsil
PP 3
Parathyroid, thymus
PP 4/5
Parathyroid, C-cells of thyroid
Branchial arch 4 & 6
Larynx
branchial (def.)
relating to gils
brachial (def.)
relating to the arm
nRathke’s pouch
Stomadeum (mouth)
Anterior 2/3 of tongue
Foramen cecum
Posterior 1/3 of tongue
Epiglottic swelling
Laryngiotracheal groove
Arytenoid swellings
Esophagus
Rathke’s pouch
Stomadeum (mouth)
Anterior 2/3 of tongue
Foramen cecum
Posterior 1/3 of tongue
Epiglottic swelling
Laryngiotracheal groove
Arytenoid swellings
Esophagus