Pharyngeal arches and pouches Flashcards
what does each pharyngeal arch consist of
a core of mesenchymal tissue covered on the outside by
surface ectoderm and on the inside by epithelium of endodermal origin
what does each pharyngeal arch receive a substantial number of?
neural crest cells which migrate into the arches to
contribute to skeletal components of the face.
what does the musculature of the face and neck arise from
The original mesoderm of the pharyngealarches
what does each muscular componant of the pharyngeal arch have one of its own
cranial nerve.
true or false, Irrespective of where the pharyngeal arch
migrate they keep the same nerve component.
true
true or false, each arch has its own arterial component
true
Pharyngeal arch 1 Nerve
Trigeminal: maxillary and mandibular branches (CN V)
Pharyngeal arch 1 muscles
Mastication Mylohyoid Anterior belly of digastric Tensor palatine Tensor tympani
Pharyngeal arch 1 skeleton
Premaxilla Maxilla Zygomatic bone Part of temporal bone Meckel’s cartilage Mandible malleus Incus Anterior ligament of malleus Sphenomandibular ligament
Pharyngeal arch 2 muscles
Facial expression Posterior belly of digastric Stylohyoid Stapedius
Pharyngeal arch 2 nerve
Facial nerve (CN VII)
Pharyngeal arch 2 skeleton
Stapes Styloid process Stylohyoid ligament Lesser horn and upper portion of body of hyoid bone
Pharyngeal arch 3muscles
stylopharyngeus
Pharyngeal arch 3 nerve
Glossopharyngeal nerve (CN
IX)
Pharyngeal arch 3 skeleton
Greater horn and
lower portion of body
of hyoid bone
