The respiratory system is divided into four components: the upper respiratory system, lower respiratory system, chest wall and diaphragm. Upper respiratory system: The upper respiratory system comprises all structures and passages involved in the conduction of air from outside the body to the larynx. This system includes the nose, mouth and structures within the hypopharynx.
These 10 animal facts will amaze you. There are two fundamentally different types of laser eye surgery: PRK and LASIK. Under these two categories, there are several different flavors or modifications of each type. For example, LASEK (with an E) is a newer type of PRK.here are two fundamentally different types of laser eye surgery: PRK and LASIK. Under these two categories, there are several different flavors or modifications of each type.
Corneal surface diseases can cause poor vision as well as discomfort. Depending on the type of corneal disease there are several different surgery options. Bladeless Laser Cataract Surgery. The LenSxÂ® Laser offers advanced technology for customized precise incisions and for patients needing astigmatism correction. This new computer-controlled option revolutionizes traditional cataract surgery.