Physiologists (see Physiology) have also studied the mechanisms that are involved in gas exchanges between the blood of an animal and the environment, or the mechanisms that are involved in the transport of gas in the body. In this case, it refers to : Respiration, the biological function by which the organism absorbs oxygen and disposes of carbon dioxide. See the following subjects :

Cellular respiration, the process in which the chemical bonds of energy-rich molecules such as glucose are converted into energy usable for life processes

Respiratory system of humans and other mammals

A respirator is a device designed to protect the wearer from inhaling harmful dusts, fumes, vapors, and/or gases. Respirators come in a wide range of types and sizes used by the military, private industry, and the public. There are two main categories:...

Anaerobic respiration, a process that allows respiration without use of oxygen; can only happen for a limited amount of time in humans

Respiration (physiology), the process by which multicellular organisms capture and excrete the gaseous fuel and waste of cellular respiration

Respiratory disease

Artificial respiration

Respiratory rate, the number of breaths an animal takes per minute

Respiratory arrest, the cessation of the normal tidal flow of the lungs due to paralysis of the diaphragm

Hypoventilation (also known as respiratory depression) occurs when ventilation is inadequate to perform needed gas exchange

Aquatic respiration, the process whereby an aquatic animal obtains oxygen from water

Cheyne-Stokes respiration

Muscles of respiration

Respiratory tract in humans is the part of the anatomy that has to do with the process of (physiological) respiration

Carbon respiration, a phrase used in combination with carbon storage to calculate the amount of carbon (as CO₂) flux occurring in the atmosphere through the various processes that add and subtract atmospheric carbon

Inspiratory paroxysmal respiration (also known as "reverse sneezing"), a phenomenon observed in dogs (Especially small dogs)

Agonal respiration

Apneustic respirations

Plant respiration, the enzymatic oxidation of substrates in plants, leading to the release of carbon dioxide

Respiration rate, a parameter which is used in ecological and agronomical modelling

Biot's respiration

Ataxic respiration

External respiration, the process by which gases are exchanged between the atmosphere and the pulmonary loop of circulation.

Respiratory therapy or Inhalation therapy, the assessment and treatment of respiratory and cardiovascular pathologies