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.
âPerfect useâ requires a woman to take the pill every single day at the same time without skipping a dose or being late on starting a new pill pack. When taken perfectly, birth control pills are 99 percent effective in preventing pregnancy. However, most women donât take birth control pills in this manner.