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Unformatted text preview: Only a few eggs and only nurtures those Different from fish who lay lots of eggs in hoping of few survivors Placenta A specialized temprorary organ that connects the embryo and fetus with the uterus in mammals, mediating the delivery of oxygen and nutrients. Analagous structures occur in other animals Embryo develops internally Provides food, oxygen, and pathway for wastes Primates Sebaceous gland Releases oil to keep hair moist Sternal keel Most important and reinforced structure in the bird Sweat gland Secretes sweat that is used to cool body Viviparous Referring to animals that retain the embryo within the mother's body and nourish it during at least early embryo develop Narsyoials or Eutherians...
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