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The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary ...
Diseases of the Nervous System and Sense Organs VII 390–459: Diseases of the Circulatory System VIII 460–519: Diseases of the Respiratory System IX 520–579: Diseases of the Digestive System X 580–629: Diseases of the Genitourinary System XI 630–679: Complications of Pregnancy, Childbirth, and the Puerperium XII 680–709
List of ICD-9 codes 320–389: diseases of the nervous system and sense organs; List of ICD-9 codes 390–459: diseases of the circulatory system; List of ICD-9 codes 460–519: diseases of the respiratory system; List of ICD-9 codes 520–579: diseases of the digestive system; List of ICD-9 codes 580–629: diseases of the genitourinary system
In mammals, physiological respiration involves respiratory cycles of inhaled and exhaled breaths. Inhalation (breathing in) is usually an active movement that brings air into the lungs where the process of gas exchange takes place between the air in the alveoli and the blood in the pulmonary capillaries .
This is a shortened version of the eighth chapter of the ICD-9: Diseases of the Respiratory System. It covers ICD codes 460 to 519. The full chapter can be found on pages 283 to 300 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
Shortness of breath (SOB), known as dyspnea (in AmE) or dyspnoea (in BrE), is an uncomfortable feeling of not being able to breathe well enough. The American Thoracic Society defines it as "a subjective experience of breathing discomfort that consists of qualitatively distinct sensations that vary in intensity", and recommends evaluating dyspnea by assessing the intensity of its distinct ...
Cardiorespiratory fitness can be increased by means of regular physical activity and exercise. The medical community agrees that regular physical activity plays an important role in reducing risk of cardiovascular disease, stroke, hypertension, diabetes, and a variety of other morbid conditions.
The human nose is the first organ of the respiratory system. It is also the principal organ in the olfactory system. The shape of the nose is determined by the nasal bones and the nasal cartilages, including the nasal septum, which separates the nostrils and divides the nasal cavity into two. The nose has an important function in breathing.