Respiratory System

                The Respiratory System consists of organs that help our body to breathe. It exchanges oxygen and carbon dioxide between the air and blood, regulates blood pH, helps produce sounds, moves air over the sensory receptors that detect smell, and protects against some microorganisms. Air passes through many organs before the process of gas exchange like the nasal cavity, pharynx, larynx, trachea, lungs and many more. Gas exchange usually occurs in the alveoli. Every living thing on earth needs air to be able to breathe, this process is called ventilation or breathing which air moves in and out of the lungs. Inspiration or inhalation happens when air moves in the lungs and Expiration or exhalation happens when air moves out of the lungs. There is also a process called Cellular Respiration where breathing provides the oxygen needed to make ATP from glucose.  Breathing gets rid of the potentially toxic carbon dioxide, the waste products during cellular respiration. All of these means that the Respiratory System is very important in our body. We need to breathe for us to be able to live.