Question

Bursa of Fabricius is an important organ of birds. This organ is associated with
A. Generation of basophils
B. Production of uric acid
C. Metabolism of fatty acid
D. Generation of B-cell

Answer 1

Hint: Organ is a group of tissues that perform a similar function. Tissues are the group of cells. In an organism various organs are grouped together to form an organ system such as digestive system, reproductive system, respiratory system, etc.

Complete Answer:
- Birds are the vertebrates that belong to the class Aves. They are warm blooded vertebrates.
- Birds are characterized by the presence of feathers, beak, a four chambered heart, laying of hard shelled eggs, etc.
- In birds the organ bursa of fabricius is the site of hematopoiesis that means it is the site of formation of blood cells.
- It is an lymphoid organ in birds that was demonstrated by Bruce Glick and later by Max Dale Cooper and Robert Good.
- It is a necessary organ for the development of B – cells in birds. The bursa of fabricius is present in the cloaca of birds.
- Bursa of fabricius is a blind sac which is connected by a small duct to the dorsal part of the cloaca. This organ is named after the Hieronymus Fabricius who described it in 1621. The organ bursa of fabricius is active in young birds.

Hence, option D is the correct option for this question.

Note: In mammals there is bone marrow present instead of bursa of fabricius which is responsible for the formation of blood cells and B – cells. B cells are also called as the b lymphocytes. B cells are the type of white blood cells. Their function is to secrete antibodies which help in various immune reactions and provide immunity to a person or animal.