embryology Flashcards
1st pharyngeal arch gives rise to (skeletal)
mandibular; mandibular prominence, Meckel’s cartilage*, mandible, incus, malleus
2nd pharyngeal arch gives rise to (skeletal)
hyoid; Reichert cartilage*, styloid process of temporal bone, superior hyoid, stapes
3rd pharyngeal arch gives rise to (skeletal)
inferior hyoid
4th/6th pharyngeal arch gives rise to (skeletal)
laryngeal cartilages
1st pharyngeal arch gives rise to (mesoderm)
muscles of mastication + anterior belly of digastric
2nd pharyngeal arch gives rise to (mesoderm)
muscles of facial expression + posterior belly of digastric
3rd pharyngeal arch gives rise to (mesoderm)
stylopharyngeus
4th/6th pharyngeal arch gives rise to (mesoderm)
pharyngeal constrictors, soft palate muscles, laryngeal muscles
1st pharyngeal arch (innervation)
trigeminal (V)
2nd pharyngeal arch (innervation)
facial (VII)
3rd pharyngeal arch (innervation)
glossopharyngeal (IX)
4th pharyngeal arch (innervation)
vagal (X)
1st cleft/pouch
auditory meatus, tympanum, middle ear cavity
2nd pouch
palatine tonsil (thryoid gland from midline endoderm of 2nd arch)
3rd pouch
inferior parathyroid glands, thymus