Human embryo at 7 weeks gestation, measuring approximately 14 mm (crown to rump). The upper limbs, fingers, and face are developing and growing rapidly but are still forming their shape.
The eye is developing but is not functioning yet. The brain is developing rapidly and the blood vessels supplying it with blood are clearly visible. Also note the yolk sac.
Image credit: Ralph Hutchings via Getty Images
http://www.gettyimages.com/detail/photo/human-embryo-at-7-weeks-gestation-measuring-high-res-stock-photography/81781462
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