The spinal cord is a white cord 40-45 cm long, lying in the spinal canal. Above, it passes into the medulla oblongata, and below it ends with a terminal thread. Outside, the spinal cord is covered with hard, arachnoid and soft membranes. The cavity between the arachnoid and soft membranes is filled with cerebrospinal fluid, which is also located in the spinal canal, which passes through the central part of the spinal cord.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.