After rebreathing air, respiratory rate increased and breath holding time decreased.
What is breathing?
- The act of breathing, also known as ventilation, involves moving air into and out of the lungs in order to facilitate gas exchange with the body's internal environment, primarily to expel carbon dioxide and draw in oxygen.
- All aerobic organisms require oxygen for cellular respiration, which uses carbon dioxide as a waste product and obtains energy from the reaction of oxygen with molecules received from food.
- Air is introduced into the lungs during breathing, also known as "external respiration," when gas exchange occurs in the alveoli through diffusion.
- These gases are moved to and from the cells by the circulatory system of the body, where "cellular respiration" occurs.
What role does breathing play?
- Our bodies' cells require fresh oxygen on a regular basis in order to make energy, thus breathing is necessary to get it to them.
- When we breathe, we also allow our bodies to evacuate the waste materials and toxins that they produce.
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