The spinal cord and the bone marrow are two completely different substances, and although both the spinal cord and the bone marrow are known by their scientific names as the medulla, they are not actually the same thing. The spinal cord is located mainly in the spinal canal, which connects the brain to the peripheral nerves. It is part of the nervous system and is responsible for nerve conduction, controlling joint movement and the transmission of audio and visual signals. Damage to the spinal cord will result in tetraplegia, loss of sensation and other neurological damage. Bone marrow is mainly found in the bones of the human body and its main function is to produce blood, making it the most important blood-producing organ in the body. If the bone marrow is damaged or suffers from certain diseases, it may lead to abnormal blood production in the body and cause anemia and other diseases. Therefore, the two are different in location and function and have no similarity, so do not mistake them for the same substance just because they are both marrow.