Oral embryology weekly overview for weeks 1-9

fertilization, cleavage, morula, blastocyst, implantation

order of events in week 1

bilaminar disc, syncytiotrophoblast formation, prochordal plate formation

order of key developments during week 2 of embryonic development.

primitive node/streak/pit, gastrulation (endoderm and mesoderm), notochord, neurulation, neural plate

order of key processes during week 3 of embryonic development

neural tube, head folding, stomodeum, mandibular process, branchial archs/grooves/pouches, mand process join, buccopharyngeal mem rupture, nasal placodes form

order of major developments during week 4 of embryonic development.

nasal pit

key development during week 5

end of week 4

when does odontogenic epithelium form

meging and fusion of facial processes, naso-optic and bucconasal groove, nasal fin, oronasal membrane

key development during week 6

nasal fin, week 6

what is this structure and when does it form

oronasal membrane, week 6 after nasal fin

what is this structure, when does it form

end of week 6

when does the odontogenic epithelia merge to form primary epithelial bands

week 7-8

when does formation of secondary palate begin

nasal septum, frontonasal process, palatine shelves

what three structures merge together during weeks 7-9

1st arch/mandibular process

what structure is represented by the star

weeks 5-8

when does pouch/neck development occur

week 5

when do auricular hillocks form

weeks 4-9

when does tongue development occur