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28 Cards in this Set
- Front
- Back
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when does formation of branchial arches occur
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D23-27
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formation and folding of 1st branchial arch results in which 2 arches
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maxillary and mandibular
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5th branchial arch is absent T/F
There is no external 6th branchial archarch T/F |
T
T |
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3 sxs within the branchial arches
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1) aortic arches
2) branchiaomeric mesoderm 3) cranial nerves |
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Fate of aortic arches 1 & 2
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degenerate
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Fate of aortic arch 3
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internal carotid artery
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Fate of aortic arch 4
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right subclavian vein and arch of aorta
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Fate of aortic arch 6
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pulmonary aa
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what is the branchiomeric mesoderm
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cartilaginous and muscular elements
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fate of BM arch 1
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mm of mastication
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fate of BM arch 2
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mm of facial expression
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fate of BM arch 3
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stylopharyngeus M
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fate of BM arch 4/6
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mm of pharynx & larynx
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cranial nn in arch 1
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trigeminal (V)
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cranial nn in arch 2
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facial (7)
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cranial nn in arch 3
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glossopharyngeal (IX)
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cranial nn in arch 4/6
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vagus (X)
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branchial groove between maxillary and mandibular parts of 1st branchial arch
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stomadeum (embryoinic mouth) opens on D26
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branchial groove 1
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external auditory meatus
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Fate of Branchial arch 2
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2nd (hyoid arch) grows over 3rd & 4th arches to form cervical sinus, which dissappears (occasionally forms cyst)
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Pharyngeal pouch 1
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middle ear and auditory tube
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PP 2
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Palatine tonsil
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PP 3
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Parathyroid, thymus
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PP 4/5
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Parathyroid, C-cells of thyroid
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Branchial arch 4 & 6
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Larynx
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branchial (def.)
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relating to gils
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brachial (def.)
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relating to the arm
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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 |
