Main parts of the human respiratory system include the mouth, nasal cavity, lungs, bronchial tubes, diaphragm and trachea, according to National Heart, Lung, and Blood Institute. Other facets of the respiratory system ar... More »

Humans need a respiratory system because it is made up of organs that allow them to breathe. Breathing delivers oxygen to the body and takes away carbon dioxide. Every cell in the body needs oxygen to obtain energy from ... More »

The human respiratory system consists of the nasal cavity, pharynx, trachea, various divisions of the bronchi and two lungs. Air flows through the nose or the mouth into the pharynx, through the trachea, down the right a... More »

The National Heart, Lung and Blood Institute lists inflammation and narrowing of the airways in the lungs as asthma's primary effects on the respiratory system. The airways in people with asthma are swollen and easily af... More »

The human respiratory system consists of the nasal cavity, pharynx, trachea, various divisions of the bronchi and two lungs. Air flows through the nose or the mouth into the pharynx, through the trachea, down the right a... More »

The trachea is the tube in the throat that connects the mouth and nose to the lungs. It is also called a windpipe, and its function is to transport the air a person breathes in through his nose or mouth into the lungs. W... More »

The internal nares serve as a filter for the respiration system, keeping particles from making it into the trachea and the lungs. In addition to cleaning out the air, the internal nares also provide warmth and moisture t... More »