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Embryology - Germ Layer Derivatives
Embryology Germ layer derivatives for head and neck
5
Anatomy
Graduate
10/10/2010
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Term
Ectoderm
 Definition

epithelial lining of:

EAM

anterior 2/3 of tongue

hard palate

sides of mouth

adenophypophysis (anterior lobe of pituitary)

nasolacrimal duct
Term
Neuroectoderm (neural crest)
 Definition

bones, cartilages and ligaments from pharyngeal arches

neurohypophysis (posterior lobe of pituitary)

bones of neurocranium (bones surrounding brain)

viscerocranium (fascial and oral regions, hard palate)

 
Term
Mesoderm (paraxial)
 Definition

muscles derived from pharyngeal arches

tongue (all derived from occipital myotomes EXCEPT palatoglossus)

occipital bone around foramen magnum (occipital somites)
Term
endoderm
 Definition

pharyngeal pouch derivatives

epithelial lining of posterior 1/3 of tongue, soft palate

thyroid gland

 
Term
endoderm, mesoderm, ectoderm (all 3)
 Definition
tympanic membrane
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