Short Description About Class Mammalia

Class Mammalia –

- Aquatic, terrestrial and aerial.

- Mammary glands present for milk production.

- Two pairs of limbs.

- Skin with hair.

- Ear with pinna.

- Homoiothermic.

- Heart four chambered.

- Excretion by kidneys.

- Respiration by lungs.

- Sexes separate.

- Internal fertilisation, vivipary (exception Platypus).

- eg. Whale, Rat , Man, Tiger etc.