All of the following are derived from mesoderm except:
Correct answer: B. Liver
- A. Muscles
- B. Liver
- C. Gonads
- D. Blood vessels
Explanation
GERM LAYERS: A germ layer is a group of cells in an embryo. There are 3 germ layers: the endoderm (inner layer), the ectoderm (outer layer), and the mesoderm (middle layer). All the parts mentioned are formed by mesoderm except for the liver, which is a product of endoderm.
This question appeared on the ETEA MDCAT 2011 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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