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Mammalias are warm blooded animals . They have four chambered hearts and have mammary glands for production of milk for theit young ones. Their skin has hairs as well as sweat and oil glands. They gives birth to new young ones For example kangaroos,cat,human and bat.
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Mammalia has  warm blood,four chambered heart,milk gland.They can give life to their young ones.

EXAMPLES: Human beings, Animals.

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