notochord

The notochord is a flexible, rod-like structure that forms early in the development of vertebrates, including humans. It runs along the back, providing support and serving as a scaffold for the development of the spinal column and nervous system. Although it mainly disappears as the organism matures, its presence influences the formation of the vertebrae and other tissues. The notochord is essential for proper development, acting as a guide for the growth of surrounding structures and helping establish the body's basic skeletal framework during early embryonic stages.