Gen. Embryology Flashcards
Pharyngeal Arch / Branchial Arch
1- V- Meckels cartilage; muscle of mastication
2- VII- reicherts cartilage; muslce of facial expression
3- IX- Greater cornu & body of hyoid
4- X- Pharyngeal & Laryngeal muscles & cartilage
6- X- Laryngeal muscles
Pharyngeal Pouch
1- MAT : Middle Ear, Auditory tube , Tympanic Membrane
2- Palatine tonsil & Lymphatic nodule
3.- Thymus & Inferior Parathyroid Gland
4- Superior Parathyroid & Ultimobranchial body
Pharyngeal Cleft
1- EAM
2,3,4- Cervical sinus
Tongue Development
Ant. 2/3
1st Pharyngeal Arch
Lateral Lingual Swelling & Tuberculum Impar
Post. 1/3 tongue development
2nd & 3rd Pharyngeal Arch + Copula
1st Pharyngeal Arch divides into
Mandibular Process
Maxillary Process
Bilaminar germ disc (primitive streak)
Trilaminar Germ Disc
ECTODERM
Enamel
Skin
Nervous System
Mesoderm
Dentin Pulp Muscle Skeleta Genitourinary
Endoderm
Gastrointestinal
Respiratory
Fetus Ductus Arteriosus
Ligamentem arteriosum
Ductus venosus
Ligamentum venosum
Foramen Ovale
Fossa Ovalis
Umbilical vein & Arteries
Ligametum teres of the liver & Medial umbilical ligaments
defects anodontia & supernumerary
Formation of Dental Lamina
Initiation (6th week)
proliferation of both ectodermal & ectomesenchymal cells
Bud stage (8th wk)
of cusp tips
Enamel knot
betweem OEE & IEE
Stellate Reticulum
defects : DEntinogenesis Imperfecta, amelogenesis imperfecta , macro/microdontisa
Morpho & Histodifferentiation
Appositional Stage (14th week)
Chronological Order
- Diff. ameloblast
- Diff. odontoblast
- Deposition of dentin matrix by odontoblasts
- Depositipm of enamel matrix by ameloblasts
- last product / final product of ameloblasts
- first protectiv ecovering
Primary Enamel Cuticle
Nasymyth’s Membrane
fusion of IEE, OEE,, SR & SI
secondary enamel cuticle
forms JE
defects: enamel dysplasia, concrescensce, enamel pearls
REE Appositional Stage (14th week)
forms apical foramen
determines # of roots
Epithelial Diaphragm
basic structural unit
Enamel rods / Enamel prism
