The primary lymphoid organs are

1. Bone marrow and thymus

2. Bone marrow and spleen

3. Spleen and thymus

4. All three

Which of the following is not a lymphoid organ?

1. Appendix

2. Thyroid

3. Peyer's patches

4. Tonsils

The formation of effector lymphocytes will occur in

1. Bone marrow

2. Thymus

3. Appendix

4. Thyroid

What is the main lymphoid organ where all blood cells including lymphocytes are produced?

1. Spleen

2. Thymus

3. Lymph nodes

4. Bone marrow

The microenvironment  for the maturation and development of T lymphocytes is created by

1. Bone marrow

2. Thymus

3. Both A and B

4. Spleen

The immature lymphocytes differentiates into antigen sensitive lymphocytes in

1. Bone marrow

2. Thymus

3. Both A and B

4. Spleen

The site of interaction of lymphocyte with antigen is

1. Bone Marrow

2. Thymus

3. Both A and B

4. Lymph nodes

Thymus is not

1. Lobed organ

2. Bean shaped

3. Located near heart

4. Beneath the breastbone

Which of the following acts as a filter of blood?

1. Bone marrow

2. Lymph node

3. Spleen

4. Thymus

Spleen is not

1. Large reservoir of erythrocytes

2. Mainly contains lymphocytes and phagocytes

3. Bean shaped

4. Lobed organ