Gaseous exchange

Diffusion

movement of molecules from a region of high concentration to a region of low concentration along a gradient until it reaches an equilibrium

Cellular respiration

breakdown of organic compounds (glucose / sugar) in the mitochondria of cells into inorganic compounds (H20 and CO2) with the release of cellular energy (ATP); can be aerobic or anaerobic

Catabolism

breaking down of complex molecules into simple molecules to release energy

Terrestrial

lives on land

Aquatic

lives in water

Gaseous exchange

Exchange of O2 and CO2 at a respiratory surface

Breathing / Ventilation

mechanical process of inhalation and exhalation through which air moves in and out of the respiratory organs enabling the uptake of oxygen and the removal of carbon dioxide

Inhalation

breathing in of air

Exhalation

breathing out of air

Diaphragm

dome shaped muscle involved in breathing that seperates thoracic (chest) and abdominal cavities in mammals

Spirometer

instrument used to measure volume of air that enters and leaves human lungs while breathing

Spitum

Phlegm

Histamine

substance in body that can cause itching

Noxious

Poisonous