The Mechanics Of Breatjing

The Me cha Bre n ath ics O in g f

Breathing

Breathing 

Breathing is a process that all aerobic organisms must fulfill, breathing exchanges gases between an environment and the organism. The requirement of oxygen required in cellular respiration is met by breathing, the product of cellular respiration is ATP (energy) and carbon dioxide, the carbon dioxide needs to be expelled and more oxygen is required, this is were breathing comes in.

Breathing ItAfter Breathing travels thethrough air begins enters the when the pharynx, abronchi person past and inhales the splits larynx, orinto takes the andabronchiole, enters breathe the in.trachea, travelling Air enters the through through trachea until the splits the nostrils of airinto reaches and thetravels left theand through right alveoli, bronchi. the were nasal the air passage. diffuses into capillaries, and carbon dioxide diffuses out.

The Mechanics When a breathe of air is either inhaled or exhaled there are various muscles that either relax or contract.

-Inhaling/Inspiration occurs when the intercostal muscles along with the diaphragm contract, the intercostal muscles lift the ribs and sternum, causing the lungs to expand, the contraction of the diaphragm opens up the thoracic cavity, this whole process causes the lungs to become a low pressure environment, and thus the environmental pressure outside is higher. In response the high air pressure rushes into the lungs equalizing the pressure.

-Exhaling/Expiration is basically the opposite of inhaling. Exhaling occurs with the lungs are full of air, and the intercostalmuscles along with the diaphragm begins to relax, the diaphragm fills in the thoracic cavity, putting pressure on the lungs, making them a high pressure environment, thus the air is forced out, and the process repeats.