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Embryo (derivatives of the first branchial arch(mandibular arch) (the…
Embryo
derivatives of the first branchial arch(mandibular arch)
the mandible and maxilla
the lower lip + part of upper lip
all the teeth
all salivary glands
all muscles of mastication
the anterior two thirds of the tongue
layer
Ectoderm
External lining of the body and oral cavity
Endoderm
internal Organ(guts)
Mesoderm
intermediate tissues(blood, cartilage, bone)
Neural crest cells
migrate to other tissues
differentiate into other type of cells
send signals to neighbouring tissue
characters
flattened dorso-ventrally
Brachial arches extend from the Endoderm to the ectodermal lining
only the 1st branchial arch is lined by ectoderm from outside and inside
TS In branchial arch
cleft (outside)
pouch(inside)
Meckel's cartilage
found in the centre of the first branchial arch
Derivatives
incus and malleus
lingual of the mandible
mental ossicles
sphenomandiblular ligament
Nerve supply of the branchial arches
mandibular arch
mandibular nerve
hyoid arch
Facial nerve