Which term means a fine, down-like hair that covers the fetus's body?

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Lanugo is the fine, down-like hair that covers the fetus's body, especially during the earlier stages of gestation. Vernix caseosa is a cheesy, protective substance that covers the skin of the fetus. The amniotic sac is the fluid-filled membrane that surrounds the fetus in the womb. Mesoderm is one of the three primary germ layers that form during embryonic development.

Which Term Means a Fine, Down-Like Hair That Covers the Fetus's