Biology · Embryology
By about 10-12 days after conception, which outer layer sends out tiny projections called chorionic villi that draw oxygen and nourishment from the mother?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Trophoblast✓
- 2Neural crest
- 3Blastula
- 4Blastocyst
Correct answer
Trophoblast
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