Leukemia is classified as cancer of which type of tissue?

Leukemia is classified as cancer of blood-forming tissue because it originates in the bone marrow, where blood cells are produced. This type of cancer primarily affects the production and function of white blood cells, which are crucial components of the immune system. In leukemia, the bone marrow produces abnormal white blood cells that don't function properly, leading to a variety of health issues. Understanding this classification is essential for grasping the nature of the disease and its implications for treatment.

The options surrounding this answer, such as bone, nervous, and muscle tissues, refer to different types of biological systems that do not primarily involve the abnormalities seen in leukemia. Bone may be involved in the disease's pathology but is not the primary tissue affected. Nervous and muscle tissues are also unrelated to the blood-forming aspects of leukemia. Thus, the distinction of blood-forming tissue is critical in recognizing leukemia's characteristics and treatment approaches.