The first PA is innervated by what CN?
Trigeminal (5)
the second PA is innervated by what CN?
Facial (7)
The 3rd PA is innervated by what CN?
Glossopharyngeal (9)
The 4th and 6th PAs are innervated what CN?
Vagus (10)
Derivatives of the first pharyngeal pouch (2)
Tympanic (middle ear) cavity Auditory tube
Derivatives of the second pharyngeal pouch (2)
palatine tonsils tonsillar fossa
Derivatives of the third pharyngeal pouch (2)
inferior parathyroid gland thymus
Derivatives of the fourth pharyngeal pouch (1)
superior parathyroid post-branchial body
Crest cells from R1 and R2 migrate to which arch?
first
Crest cells from R4 migrate to which arch?
second
Crest cells from R6 and R7 migrate to which arch?
4 and 6
True/False: R3 and R5 have crest cells migrate to the all of the archesTrue False
FALSE
Which cranial nerves innervate the tongue?
5--trigeminal 9--glossopharyngeal 12--hypoglossal
3 components of the intermaxillary segment
labial--forms the philtrum upper jaw--carries the four incisor teeth palatal--forms the triangular primary palate
What separates the nasal and oral cavities before it disappears?
the oronasal membrane (primitive choana)
What structures does the frontonasal prominence form? (4)
Forehead, bridge of nose, and medial and lateral nasal promiences
What structures does the maxillary prominence form?
cheeks, lateral portion of the upper lip
What structures does the medial nasal prominence form?
philtrum of upper lip, crest and tip of nose
What structures does the lateral nasal prominence form?
alae (outer lateral bulges) of nose
What structures does the mandibular prominence form?
lower lip
What is derived from the first cleft (groove)?
external auditory meatus (epithelium at the bottom of the matus participates in the formation of the eardrum
What is derived from the second, third, and fourth clefts?
cervical sinus (temporary)
what structure is derived from the first PA
Malleus and Incus (in ear) Maxilla Mandible Muscles of mastication
What structures are derived from the second PA
Stapes (ears) Styloid process Part of Hyoid Muscles of facial expression
what structures are derived from the third PA?
greater horn and body of Hyoid Stylopharyngeous muscle
What structure is derived from the 4th and 6th arches?
4: Laryngeal cartilages, pharyngeal constrictor muscles
Derivatives of the Paraxial mesoderm
vertebrae, dermis, muscles
derivatives of the Intermediate mesoderm
urogenital system (ie kidney)
derivatives of the Lateral plate mesoderm:–
Somitopleure: Lateral plate mesoderm associated with the ectoderm (somatic or parietal layer) forms somatic lining of the peritoneum, muscles of the limbs and body wall endoderm (splanchnic or visceral layer) forms muscle of the gut and mesentery.
Pharyngeal arch derivatives in the tongue and pharynx
dermatome forms the
connective tissue of the dermis
sclerotome forms the
skeletal elements of the vertebral column
Lingual swellings and tuberculum impar come from which arch?
first
Copula comes from which arch?
second
Hypobranchial eminence comes from which arches
3rd and 4th
Epiglottis comes from which arch?
4th
