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Germ Layer Deriv

Anatomy: Germ Layer Derivatives

QuestionAnswer
Endoderm forms EPITHELIUM of what systems? Epithelium of GIT, Resp tract, GU tract, pharyngeal pouches
Endoderm forms most of GIT. What component(s) AREN'T formed by Endoderm?? Spleen (mesoderm)
Auditory tube + middle ear cavity? Endoderm
Sublingual + Submandibular gland? Endoderm
Parotid Gland Skin ectoderm
Thyroid gland (follicles vs C cells) Follicles= endoderm C cells= neural crest cells
Blood/lymph vessels, Heart Mesoderm
Inner ear Ectoderm
Vag (lower vs upper) lower = endoderm upper = mesoderm
Adrenal Gland Cortex= mesoderm Medulla= neural crest
Nucleus Pulposus Notochord (mesoderm)
Meninges (Dura, Pia, Arachnoid) Dura= mesoderm Pia + Arachnoid= Neural Crest
Epithelium of upper vs lower anal canal upper= endoderm (b/c part of GIT) lower= ectoderm (b/c basically skin)
Pituitary (adenohypophysis vs neurohypophysis) Adenohypophysis (ant pit)= ectoderm (skin) Neurohypophysis (post pit)= neuroectoderm
Testes & Ovaries Mesoderm
Pharyngeal arch CARTILAGE neural crest
Aorticapulmonary septum Endocardial cushions Neural crest
Lens of Eye vs retina lens= skin ectoderm retina= neuroectoderm
Schwann cells, astrocytes, oligodendrocytes Schwann= neural crest astrocytes+oligodend= neuroectoderm
Musculoskeletal system (except extraocular muscles) mesoderm
kidney mesoderm
Parathyroid endoderm
Odontoblasts and teeth enamel odontoblasts=neural crest enamel= skin ectoderm
Pigment cells neural crest
ganglia (autonomic AND sensory) neural crest
mammary glands skin ectoderm
epidermis, hair, nails skin ectoderm
Created by: jsad
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