Question

Answer the following question.

Birds need to keep their body light to help in flying. Hence, they show presence of some organs only on one side. How their skeleton helps in reducing their weight?

Answer 1

1. In birds, the forelimbs are modified into wings for flying.
2. They possess a stream-lined body to reduce resistance during flight.
3. Bones are hollow or pneumatic to reduce body weight.
4. In order to reduce body weight, urinary bladder is absent. Also, females possess only the left ovary and oviduct.
5. The body is covered by feathers to facilitate flying.