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.
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.
Cosmetic eye surgery is any of a number of surgical procedures designed to improve the appearance of your eyes, primarily to reduce signs of aging. In most cases, the surgery is performed on the eyelids and/or surrounding tissues, not the eyes.Other terms for cosmetic eye surgery include blepharoplasty, cosmetic eyelid surgery, eyelid plastic surgery and cosmetic Asian eyelid surgery.Blepharoplasty is the most frequently performed cosmetic eye surgery.our costs can be higher or lower, depending on many factors, including whether you have surgery performed on both the upper and lower eyelids, on only the upper lids or only the lower lids. Blepharoplasty cost also can vary significantly based on the expertise and location of the cosmetic eye surgeon you choose.