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Question
Write a note on mammals.
Answer in Brief
Solution
- Mammals are -warm-blooded animals.
- The skin is covered with hair. It also bears sweat and sebaceous (oil) glands.
- The body is divisible into head, neck, trunk and tail.
- Females have mammary glands, which secrete milk for feeding the young ones.
- The external ear or pinnae is present.
- Heart is four-chambered and they breathe through lungs.
- Except egg-laying mammals (Platypus, and Spiny anteater), all other mammals give birth to their young ones (viviparous).
- The placenta is the unique characteristic feature of mammals, e.g Rat, Rabbit, Man.
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