![]() ![]() ![]() ![]() Learn more about how the respiratory system works. This ever-decreasing pipework eventually terminates in the alveoli, which are tiny air sacs. ![]() One leads to the left lung and the other to the right.įrom there, similar to branches on a tree, the pipe-like bronchi split again into smaller bronchi and then even smaller bronchioles. At the carina, the windpipe splits into two, creating two mainstem bronchi. After this, it reaches a section called the carina. When air enters the nose or mouth, it travels down the trachea, also known as the windpipe. As they compress, the exchanged carbon dioxide waste is pushed back out during exhalation. The lungs are like bellows - as they expand, they suck in air for oxygen. As the chest cavity volume increases, the pressure inside goes down, sucking in air through the nose or mouth and down into the lungs.Īs the diaphragm relaxes and returns to its resting position, the lung volume decreases because the pressure inside the chest cavity goes up, and the lungs expel the air. As it contracts, it moves down, allowing more space in the chest cavity and increasing the lungs’ capacity to expand. It powers most of the work necessary in breathing. The diaphragm is a muscle that is domed at the top and sits below the lungs. To breathe, we use the muscle of the diaphragm, the intercostal muscles between the ribs, the muscles of the abdomen, and sometimes even muscles in the neck. The organs require help from surrounding structures in the body in order to breathe properly. From there, it circulates to the rest of the body. The lungs’ main role is to bring in air from the atmosphere and pass oxygen into the bloodstream. Share on Pinterest Hello Lovely/Getty Images ![]()
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