With eye pain, there may be other symptoms too, which may help diagnose the cause of the discomfort. These include: 1  Conjunctivitis-red itchy eyes. 2  Tears. 3  Light sensitivity (photophobia). 4  Discharge, which can be clear, or thick and coloured (pus). 5  The eye being crusted shut after sleep due to discharge.
The process of breathing performs a number of important gas exchanges through inhalation and exhalation. When someone inhales, they contract and move their diaphragm, which allows the lungs to expand. This is a part of the process needed to psychically suck in the air. When a person exhales, the diaphragm relaxes and the movement is undone. This allows air to be gradually pushed out of the lungs.
Blood exchange occurs here. The process of which a person takes one breath is called the respiratory cycle. The Nose: First, air enters your body either through your nose or your mouth, where it is then held in your nasal cavity/oral cavity. Once inside the nasal cavity, the air passes through the nasal conchae.As it travels, the air makes rapid swirls of movement in order to cause small particles in the air to stick to mucus.nce inside the nasal cavity, the air passes through the nasal conchae. As it travels, the air makes rapid swirls of movement in order to cause small particles in the air to stick to mucus.