To breathe deeply by inhaling a large amount of fresh air and then exhaling forcefully.

respiratory tract; the series of passages such as the nose, throat, and trachea through which air is inhaled and exhaled

ventilator or artificial breathing apparatus used in hospitals; rebreather

The upper part of the respiratory system, which includes the nasal cavity, pharynx, larynx, and trachea.

A first aid technique used to restore breathing by manually or mechanically forcing air into and out of the lungs; includes methods such as mouth-to-mouth resuscitation or chest compressions.

The system of organs in humans and animals responsible for exchanging gases between the body and the environment; in humans it includes the nose, throat, larynx, trachea, bronchi, and lungs.

an organ used for breathing, including lungs, gills, or tracheae; any anatomical part used for gas exchange

Process in biology where gases are exchanged between the lungs and the outside air, allowing the blood to absorb oxygen and release carbon dioxide

to have exhaled and inhaled air pass through to one another; to be interconnected by breathing

an aerial root that grows up out of the water or mud to help a plant breathe

the branching respiratory organ of a sea cucumber used for gas exchange

snorkel; breathing tube used for swimming near the surface

regulator used for breathing in scuba diving

The physical movement of the lungs expanding and contracting to exchange air; respiratory movement of the chest during breathing.

(scuba diving) a backup regulator or secondary air source used for emergencies

deep breathing caused by the expansion and contraction of the diaphragm

infection of the upper respiratory tract

severe acute respiratory syndrome, a viral respiratory disease caused by a coronavirus

severe acute respiratory syndrome; SARS

severe acute respiratory syndrome (SARS); a viral respiratory disease caused by a coronavirus

severe acute respiratory syndrome, a viral respiratory disease caused by a coronavirus

Middle East respiratory syndrome; MERS

(scuba diving) second-stage regulator; a device that reduces air pressure to a breathable level upon inhalation

The process by which light promotes respiration in certain plants

The biological process in which cells break down organic matter to produce energy for cellular activities.

an opening used for breathing, such as a blowhole or nostril; specifically a spiracle in insects and certain other animals