mammals

mammals - -latches to nipple & continues...

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amniotes endothermic high energy demands hair retain warmth mammary glands nurse young differentiated teeth diverse feeding habit Mammals
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most terrestrial 1000 spp. winged mammals - bats 80 spp of dolphin, porpoises & whales - aquatic Mammals
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Monotremes - egg laying Duck-billed Platypus & two species of anteaters -- lay shelled egg -- hair & mammary glands though lack well-defined nipples milk oozes from mothers fur
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marsupials Marsupials - yolk type placenta; no shell - internal development initially - after birth crawls into marsupial pouch
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Unformatted text preview: -latches to nipple & continues development ~100 mya - just before placental mammals S. America & Australia & New Zealand. only N.A. marsupial - opossums placental mammals - development w/in uterus nourishes embryo via placenta maternal & fetal blood vessels w/in placenta for exchange of nutrients & wastes internal development / gestation note: amniote -- embryo develops within a fluid-filled sac Human evolution will be discussed during lab after we talk more about evolution...
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mammals - -latches to nipple & continues...

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