Question

Which of the following is hematopoietic tissue in man?
A. Myeloid tissue
B. Lymphoid tissue
C. Both A and B
D. None of the above

Answer 1

Hint: The tissue is considered to be a group of similar cells that are in proximity to one other, assembled to perform specific functions. Tissues are classified based on their morphology and function into epithelial tissue, muscle tissue, connective tissue, and nervous tissue.

Complete answer:
Haematopoietic tissues are tissues that produce blood cells during the haematopoiesis process. Haematopoietic tissues consist of both myeloid and lymphoid tissues, which are found throughout the body. These tissues primary function is to produce white blood cells, red blood cells, and platelets. They also produce cells known as inflammatory cells, which react to traumatic injury, infectious agents, and other conditions. Myeloid tissues are located within the red bone marrow, whereas the lymphoid tissues are categorized structures that maintain the immune responses. The bone marrow as well as the thymus are considered to be the primary lymphoid tissues. The tonsils, spleen, lymph node, and peyer’s patch are considered to be the secondary lymphoid tissue. The bone marrow is a soft gelatinous tissue that consists of stem cells, which can develop into red blood cells, platelets, and white blood cells. It is located in the bone cavities. Along with the spleen and liver, the bone marrow also contributes to the destruction of old red blood cells. The T cells and B cells are considered to be the vital cell types of lymphoid tissues.
Therefore, the correct answer is option C, i.e., Both A and B.

Note: The red blood cells produced by the bone marrow carry oxygenated blood throughout the body, the platelets clot the blood whereas the white blood cells fight off infections. Histology is a term defined as the study of animal and human tissues. This term was introduced in the year 1801 by the French pathologist and anatomist, Marie Francois Xavier Bichat.