OVERVIEW OF THE IMMUNE SYSTEM
LYMPHATIC AND IMMUNE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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spleen
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bone marrow
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thymus gland
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None of the above
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Detailed explanation-1: -Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes. Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel).
Detailed explanation-2: -THE THYMUS IS A PRIMARY LYMPHOID ORGAN ESSENTIAL FOR THE DEVELOPMENT OF T LYMPHOCYTES WHICH ORCHESTRATE ADAPTIVE IMMUNE RESPONSES.
Detailed explanation-3: -The thymus gland is in the chest between the lungs. It makes white blood cells (T lymphocytes) which are part of the immune system and help fight infection.
Detailed explanation-4: -There are two primary lymphatic organs: the red bone marrow and the thymus gland. The development of white blood cells (haemopoesis) was covered briefly in the section on blood. Both T-cell and B-cells are ‘born’ in the bone marrow.