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Umbilical cord

Umbilical cord, in mammals, tubelike structure linking the developing embryo, or fetus, to the placenta through most of pregnancy. It consists of blood vessels that carry blood to and from the placenta, along with a gelatinous matrix. In humans, the cord is clamped at birth to prevent blood loss. It undergoes atrophy and its remains become the navel.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Transcendentalism to United Church of Christ