Read the following passage and answer the question : The primary lymphoid organs are bone marrow and thymus, where immature lymphocytes differentiate into antigen sensitive lymphocytes. They migrate to secondary lymphoid organ like spleen, lymph nodes, tonsils, payer’s patches of small intestine and appendix. All blood cells including lymphocytes are produced in bone marrow which is main lymphoid organ. Spleen is large reservoir of erythrocytes. It is large bean shaped organ mainly containing lymphocyte and phagocyte. It acts as filter of blood by trapping blood borne micro organism. Lymph nodes are small solid structures located at different points along lymphatic system. Antigens trapped in lymph node are responsible for activation of lymphocytes present there and cause the immune response. There is lymphoid tissue located within. Lining of major tracts like respiratory, digestive ad urinogenital tracts called mucous associated lymphoid tissue (MALT).
Which of the following is not feature of spleen ?
Read the following passage and answer the question : The primary lymphoid organs are bone marrow and thymus, where immature lymphocytes differentiate into antigen sensitive lymphocytes. They migrate to secondary lymphoid organ like spleen, lymph nodes, tonsils, payer’s patches of small intestine and appendix. All blood cells including lymphocytes are produced in bone marrow which is main lymphoid organ. Spleen is large reservoir of erythrocytes. It is large bean shaped organ mainly containing lymphocyte and phagocyte. It acts as filter of blood by trapping blood borne micro organism. Lymph nodes are small solid structures located at different points along lymphatic system. Antigens trapped in lymph node are responsible for activation of lymphocytes present there and cause the immune response. There is lymphoid tissue located within. Lining of major tracts like respiratory, digestive ad urinogenital tracts called mucous associated lymphoid tissue (MALT).
Which of the following is not feature of spleen ?
It is large reservoir of erythrocyte.
It acts as filter of blood.
It shows reduction in size from birth to puberty
It is a bean shaped organ containing Lymphocyte and Phagocyte
The Correct Option is C
Solution and Explanation
The correct option is(C): It shows reduction in size from birth to puberty.
The feature that is not mentioned in the passage as a characteristic of the spleen is "It shows reduction in size from birth to puberty."
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Concepts Used:
Immune System
It consists of tissues, cells, soluble molecules like antibodies and lymphoid organs. The WBC cells called the leucocytes have a significant role as they seek out to destroy the disease-causing organisms. These leucocytes are stored in different locations in the body including the spleen, bone marrow, and thymus. These organs are called as the lymphoid organs. The leucocytes are also present in the lymph nodes of the body.It is considered as the main lymphoid orga and. It produces all the blood cells including the lymphocytes. The thymus is an organ that is present near to the heart, beneath the breastbone.
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