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In physiology, respiration is the transport of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction to the environment by a respiratory system.
In humans and other mammals, the anatomy of a typical respiratory system is the respiratory tract.The tract is divided into an upper and a lower respiratory tract.The upper tract includes the nose, nasal cavities, sinuses, pharynx and the part of the larynx above the vocal folds.
Complete respiratory system. The respiratory tract is divided into the upper airways and lower airways.The upper airways or upper respiratory tract includes the nose and nasal passages, paranasal sinuses, the pharynx, and the portion of the larynx above the vocal folds (cords).
In humans the lungs are located in the chest on either side of the heart in the rib cage.They are conical in shape with a narrow rounded apex at the top, and a broad concave base that rests on the convex surface of the diaphragm. [1]
Animation of diaphragmatic breathing with the diaphragm shown in green. Diaphragmatic breathing, abdominal breathing, belly breathing, [1] or deep breathing, [2] is breathing that is done by contracting the diaphragm, a muscle located horizontally between the thoracic cavity and abdominal cavity.
A respiratory examination, or lung examination, is performed as part of a physical examination, [1] in response to respiratory symptoms such as shortness of breath, cough, or chest pain, and is often carried out with a cardiac examination.
Development of the tracheal system in Drosophila melanogaster.. An insect's respiratory system is the system with which it introduces respiratory gases to its interior and performs gas exchange.