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.
Check our birth control statistics for more information. There are many hormonal types of birth control to choose from such as birth control pills, the shot, skin patch, mirena iud, and nuvaring birth control. Hormonal types of birth control prevent pregnancy by stopping monthly egg production. It can also help relieve heavy periods, cramping and acne.