A cell membrane is also known as a plasma membrane or cytoplasmic membrane. The cell membrane separates the interior of a cell from its outside environment. The main function of a cell membrane is to protect the cell from its surroundings.
assisted ventilation. Definition: application of mechanically or manually generated positive pressure to gas(es) in or about the airway during inhalation as a means of augmenting the movement of gases into the lungs. Synonym(s): assisted respiration. Search Stedman's Medical Dictionary.
Ventilation refers to the process of air movement into and out of our lungs, and it includes both inspiration and expiration. Inspiration occurs when lung pressure is decreased below atmospheric pressure, and that causes the air to move into the lungs.