Question

give a short note on Aves

Answer 1

Class Aves –

- presence of feather, beak and forelimb in form of wing.

- Hind limb adapted to clasping, walking and swimming.

- No glands on skin (only oil gland at tail base).

- Hollow bones (pneumatic).

- Air sacs connected to lungs to supplement respiration.

- Crop and gizzard are additional chambers in digestive system.

- Warm blooded.

- Heart four chambered.

- Sexes separate.

- Fertilisation internal and development direct.

- eg. Columba, Psittacula etc.

Answer 2

Aves are warm blooded animals and have a four chambered heart. They lay eggs. There is outside covering of feathers, and two forelimbs are modified for flight. They breathe through lungs. All birds fall in this group.. Hope it helped. Thanks.