DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
An eight-week human foetus rests in an adult's palm. The complete foetus is visible inside an intact amniotic sac, the membranous, fluid-filled bag that cushions & protects the developing infant. The amniotic sac is bound by two membranes, the inner amnion & outer chorion.
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