The hair shaft is the part of the hair that sticks out of the skin. The hair shaft is connected to the follicle.
There are many components that make up hair structure to make it the fastest growing tissue in the body. Hair can be found on many parts of the body, with the most evident being the hair on one's head, where the hair shaft is much longer than other parts of the body.
Hair shaft damage can cause hair loss and other hair issues. For instance, loose anagen syndrome results in hair that grows in loosely and can easily be pulled from the follicle. This disease is often caused by genetic problems.