One of the following can retain a large amount of urea in the blood and tissue fluid.

Increase in amount of urea in blood is called:

Give the reason for the following statements: Cartilage fishes retain large amount of urea in their body fluids.

Explain the following sentence: Sharks retain more urea in their blood.

Which of the following can be related to the tissue called blood ?

Which of the following can be related to the tissue called blood ?

Which of the following blood vessel contain maximum amount of urea?

Which of the following blood vessel contain maximum amount of urea?

Which blood vessel contains the least amount of urea ?

Which blood vessel contains the least amount of urea ?