Embryology — Flashcards

Flashcard 41: adenohypophysis

Answer: surface ectoderm

Flashcard 42: Rathke's pouch

Answer: surface ectoderm

Flashcard 43: lens of the eye

Answer: surface ectoderm

Flashcard 44: Embryological origin of the sensory organs of the ear (inner ear)?

Answer: Otic placode (from Surface Ectoderm)

Flashcard 45: melanocytes

Answer: neural crest

Flashcard 46: chromaffin cells of adrenal medulla

Answer: neural crest

Flashcard 47: odontoblasts

Answer: neural crest

Flashcard 48: muscle

Answer: mesoderm

Flashcard 49: Embryological origin of bone:

Answer: Mesoderm (specifically Paraxial, Intermediate and Lateral plate mesoderm, and Neural crest cells) \n\n*General rule: Most connective tissues like bone, cartilage, and muscle are mesodermal in origin. Noted exception: craniofacial bones derive from neural crest.*

Extra: The skeletal system develops primarily from: \n1. Paraxial mesoderm (somites) - axial skeleton. \n2. Lateral plate mesoderm - limb skeleton.\n3. Neural crest cells - craniofacial bones.

Flashcard 50: serous linings of body cavities

Answer: Lateral plate mesoderm

Extra: Specifically, the somatic layer (parietal lining) and splanchnic layer (visceral lining) of the lateral plate mesoderm.