Question

Incorrect about bone marrow is :-
(a) Primary lymphoid organ
(b) Main lymphoid organ where all blood cells excluding lymphocytes are
produced
(C) Provide micro environment for the development of T-cells
(d) Produces B-cells
(2) с
() b + c
(4) All statements are correct​

Answer 1

Answer:

the answers is

Explanation:

option (4)

alll statement are correct

hope it's help you

Answer 2

Answer:

The answer is (3) b and c. The incorrect statements about bone marrow are that it is “a main lymphoid organ where all blood cells excluding lymphocytes are produced” and it “provides micro-environment for the development of T-cells”.

Explanation:

Bone marrow is the spongy tissue found in some of the bones of the body. It is the primary site of hematopoiesis, the process of new blood cell production. It consists of marrow adipose tissue, hematopoietic cells, and supportive stromal cells. It contains immature cells called stem cells. Its main function is to replace damaged cells with new blood cells.

• It is a primary lymphoid organ, along with the thymus. They both create lymphocytes (special immune system cells).
• In the human body, 12% of lymphoid cells are found in the bone marrow. In the bone marrow, blood stem cells divide and mature to form either lymphocytes or other blood-forming cells.
• T cell development completely depends on the constant migration of bone marrow progenitors through the complex thymus microenvironment. Hence, T cell development and maturation occur in the microenvironment of the thymus.
• It is the major site of the development and maturation of B cells and then they transport to peripheral lymphoid organs.

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