Muscles develop from:
Correct answer: B. mesoderm
- A. ectoderm
- B. mesoderm
- C. endoderm
- D. all of the above
Explanation
Muscles develop from the mesoderm, which is one of the three primary germ layers in the early embryo. The mesoderm also gives rise to the skeletal and reproductive systems. The ectoderm forms the skin and nervous system, while the endoderm develops into the lining of the digestive and respiratory systems. Thus, the correct answer is B: mesoderm.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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About Embryonic Development
Embryonic development begins after fertilization with cleavage and formation of the morula and blastula, followed by gastrulation and the establishment of germ layers. It includes organ formation, tissue differentiation and early growth, rather than the later increase in size associated with postnatal development.
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