Embryology: Branchial Apparatus Formation Flashcards
Where is the branchial apparatus found?
Inferior to stomadeum
What does the branchial apparatus consist of?
Branchial Arches
Branchial Grooves
What does each arch consist of?
Mesenchyme (from neural crest cells)
Ectoderm
Endoderm
What is the first brachial arch?
Mandibular arch
What cartilage is associated with the mandibular arch?
Meckels Cartilage
Which arch directs the development of the mandibular teeth and associated structures?
Mandibular Arch (first arch)
What muscles are associated with the first arch?
Muscles of Mastication
Some Suprahyoid & Palatal muscles
What is the innervation of the mandibular arch?
V3
What is the name of the 2nd arch?
Hyoid
What is the cartliage associated with the hyoid arch?
Reicherts Cartilage
What bones are associated with the hyoid arch?
Hyoid and Temporal Bones
What muscles are associated with they Hyoid arch?
Muscles of Facial Expression
What is the common innervation of the hyoid arch?
VII
What is the name of the third arch?
Unamed
What structures are associated with the third arch?
Tongue
Part of the Hyoid Bone
What is the innervation for the 4th and 6th unamed arches?
IX and X
What is the first branchial groove?
external auditory meatus
What branchial grooves are obliterated?
2nd - 5th
What is the first pharyngeal pouch?
Tympanic membrance (ear drum)
What is the 2nd pharyngeal pouch?
Palatine tonsils
What do the 3rd and 4th pharyngeal pouches contribute to?
Parathyroid gland and Thymus
What was the embryonic source of Labii Levator superioris?
Second brachial Arch
What is the embryonic origin of the masseter muscle?
1st Brachial Arch
