How does respiration occur?

Answer 1

when the air pressure outside the body is greater than the air pressure inside the lungs, the lungs fill with air (simple physics). when the alveoli absorb the oxygen and transport the oxygen through the capillaries to the red blood cells, all that's left of the air is carbon dioxide, and probably some nitrogen. the diaphragm (muscle below the lungs) then contracts, forcing whats left of the air out of the lungs, and the entire process repeats itself.there are 4 or more usally. respiration is also the pressure air point. please people do ur own homework.

Answer 2

Air is inhaled by the lungs which enters the wind pipe via nose. When air enters the lungs, its volume increases and the diaphragm goes down little bit. For exhaling the diaphragm just under the lungs pushes up which increases the partial pressure in the lungs and this pushes air outside of the lungs and the volume of lungs decreases as they are emptied of air.

Answer 3

Respiration is a chemical process that breaks down nutrient molecules (mainly glucose) in every cell in the body to release energy.

Breathing is NOT respiration! Breathing is also called ventilation, but while breathing is the inhaling and exhalation of air, respiration is the chemical process in the cells.

Answer 4

Respiration takes place by nasal passage go to lungs to purifi.