Development of the Skull, Face and Palate Flashcards
what does the skull develop from ?
mesenchyme
neurocrainium is
around the brain
viscerocranium
is the skeleton around the face
what are the two parts of the neurocranium ?
cartilagenous and memranous parts
what process forms the bones of the skull
endochondral ossification
what type of cartilage gives rise to the ethmoid bone ?
prechordal cartilage
parachordal cartilage gives rise to
occipital bone
hypophysial cartilage gives rise to
forms around the pituitary gland
ethmoid, nasal, lacrimal, and inferior concha are formed from
olfactory capsules
petrous and mastoid parts of petrous bone are formed by
otic capsule
forms the greater and lesser wings of the sphenoid
optic capsule
the membranous neurocranium is derived from
neural crest cells
what process forms the neurocranium
intermembranous ossification
the membranous viscerous cranium is from
the first arch and neural crest cells
membranous neurocranium forms what bones
frontal, parietal, sqaumous part of temporal and portion of occipital
viscerocranium froms what vones
squamous temporal, maxillary and zygomatic bones and most of the mandible
cartilagenous viscerocranium is from what
first and second arches via endochondral ossification
first arch forms
malleus and incus and parts of mandible
second arch forms
stapes, lesser horn, and superior part of hyoid bone
third arch forms
greater horns and inferior part of hyoid bone
fourth and third arch form
epiglottis
what forms the laryngeal cartilages
fourth and sixth arches
when does the development of the face begin ?
4th week
what does the development of the face rely on
organizing centers related to the forebrain
face develops around what structure
stomadeum
the nasolacrimal duct forms from _______of the nasolacrimal groove
ectoderm
______________ are not present at birth but develop in early life by the eroding of bone
paranasal sinuses
what do the neural crest cells that remain in the surface ectoderm form
neuroepithelium