A 3-week-old embryo is seen under microscope. Which germ layers are seen?
Epiblast and hypoblast
Epiblast only
Ectoderm, mesoderm, and endoderm
Ectoderm and endoderm
General Embryology
Limbs
Vascular System
Respiratory System
Digestive System
Urogenital System
Head and Neck
Central Nervous System
Ear
Eye
Integumentary System
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