Quick Answer. The function of the cartilaginous rings of the trachea is to stabilize the trachea and keep it rigid while allowing the trachea to expand and lengthen when the person breathes. If the trachea was not supported in this way, it would simply collapse because of the pressure of the chest.
1 The Pill. The pill is the common name for oral contraception. It's one of the safest, most effective, and popular methods of birth control. The pill is made up of synthetic forms of hormones that naturally occur in a female's body - progestin and estrogen.
Figuring out the most effective birth control method is a very important step. The Depo Provera birth control shot is one of the most effective methods of birth control available today. The shot is most successful when taken in succession. This means that if you get the shot regularly, every 3 months, its effectiveness is increased.