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प्रश्न
Which of the following organs develop first?
विकल्प
Liver
Heart
Kidneys
Notochord
MCQ
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उत्तर
Notochord
Explanation:
The notochord develops first during embryonic development as a primitive axial support structure before the formation of major organs like the liver, heart, and kidneys. It is a key early developmental structure from which the vertebral column and central nervous system arise later. The heart forms about one month into pregnancy, after the notochord has developed.
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