The longest cells in the human body are neurons. Some neurons, such as those that extend from the spinal cord to the toes, can be nearly 5 feet long! These nerve cells are responsible for transmitting signals throughout the body.
Neurons are highly specialized cells that have lost the ability to divide after they mature. However, they can regenerate the end of their axons if they are injured. This allows them to maintain their long length and continue to function properly.
