The brain is an organ of the human nervous system that plays an important role in controlling all body functions and performing the tasks of daily life. However, in addition to the central part, there is a peripheral nervous system, which consists of nerve fibers running in the bones, muscles and ligaments. These fibers form the so-called bone marrow - tissue containing blood cells and cells responsible for the formation of hormones that are involved in the development and functioning of bone tissue.
Bone marrow also performs the function of hormonal regulation and synthesis of hormones such as testosterone, estrogen, progesterone, etc. It also plays a role in the absorption of calcium and phosphorus ions, as well as the production of fatty acids. In addition, the bone marrow is the site of the creation and maturation of lymphoid cells - white blood cells necessary to protect the body from infections and other diseases. However, in some cases, an increase or decrease in bone marrow volume can lead to various health problems. In particular, excessive formation of bone cells leads to a disease - osteomyelofibrosis, which can result in a malignant disease - myeloma. This suggests that bone marrow has serious implications for human health. On the other hand, bone marrow dysfunction in old age can cause some symptoms of arthritis, tingling and numbness in the extremities, back and neck pain, multiple sclerosis, depression and chronic fatigue. Despite the variety of functions that bone marrow performs, it occupies a special place in the body system. It not only affects bone health