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Chapter 32 - Mammals


an organ that secretes substances inside or outside the body

mammary glands

lands in female mammals that secrete milk


the sheet of muscle located beneath the lungs


a hollow, muscular organ in which offspring develop

placental mammal

a mammal that carries its young inside the uterus until development is almost complete


an organ in the uterus that nourishes the young inside it


the time during which placental mammals develop inside the uterus


a mammal in which the young have a short period of development within the mother's body, followed by a second period of development inside a pouch made of skin and hair


a mammal that reproduces by laying eggs


fierce-looking, heavy-set animals that had features of both reptiles and mammals

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