The human respiratory system - a set of bodies providing external respiration (gas exchange between the inhaled ambient air and blood).

Gas exchange is easy to perform and is normally directed to the absorption of oxygen from inhaled air and release into the environment formed in the body of carbon dioxide. It is established that an adult makes breaths per minute, and a newborn baby makes a breath in the second. Breathing does not cease to operate from his birth until his death, for without breath, our bodies can not exist. We prove that an adult exhales 4 cups of water per day ( 800 ml), and a child - about two ( 400 ml).

Airways Distinguish upper and lower airways. Go to the upper respiratory tract lower by at the intersection of the digestive and respiratory systems in the upper part of the larynx. Upper respiratory system consists of the nasal cavity (Latin cavum nasi), nasopharynx (Latin pars nasalis pharyngis) and oropharynx (Latin pars oralis pharyngis), as well as part of the mouth, since it can also be used for breathing.The system consists of the lower respiratory tract from the larynx (Latin larynx, sometimes referred to as the upper respiratory tract), trachea (ancient Greek. Τραχε α ( ρτηρία)), bronchi (Latin bronchi). Respiratory Airways provide communication environment with the principal organs of the respiratory system - lungs are lungs in the thoracic cavity is surrounded by bones and muscles of the chest. Provide oxygen to the body and remove it from the gaseous waste product - carbon dioxide.

Respiratory Airways provide communication environment with the principal organs of the respiratory system - lungs are lungs in the thoracic cavity is surrounded by bones and muscles of the chest. Provide oxygen to the body and remove it from the gaseous waste product - carbon dioxide.

Main article: respiratory physiology The basic functions - breathing, gas exchange. In addition, the respiratory system is involved in important functions such as thermoregulation, phonation, smell, moisturizing the inhaled air.

Lung tissue also plays an important role in processes such as synthesis of hormones, water and salt and lipid metabolism. In the richly- developed vascular system of the lungs is deposited blood. The respiratory system also provides mechanical and immune protection from environmental factors.