The lung is an organ of the vertebrate that is used for respiration. The main function of this respirator is to take oxygen from the air into the bloodstream and to expel carbon dioxide from the bloodstream into the air. This gas is exchanged by millions of very thin-walled air sacs made up of specialized cells called alveoli. It has other functions besides breathing. Pulmonary medical terminology begins with pulmo ( Latin language).
Respiratory work:
Aerobic respiration requires oxygen to produce energy and produces carbon dioxide as a by-product. This results in the need to effectively supply oxygen to the cell and remove carbon dioxide from the cell. In microorganisms, such as unicellular bacteria, this air exchange system is completely simple by diffusion. That is not possible in large organisms, because only a small part of the atmosphere is able to absorb oxygen through diffusion. Two major adaptations have made it possible for organisms to achieve multicellularity: an efficient circulatory system that carries gas through the bloodstream to the deepest tissues of the body, and a large internal respiratory system. It concentrates the supply of oxygen to the body by extracting it from the atmosphere, from where it can be rapidly circulated in the circulatory system.
Respiration of the air-breathing vertebrae is completed in a continuous phase.Air enters the animal through the trachea which is often found in reptiles, birds, and mammals through the nose, pharynx, larynx, trachea (also called airways), bronchi, and bronchioles; And the marginal branch of the respiratory tree. Composed of the lungs of mammals are made up of abundant alveoli, which provide a large surface area for air exchange. Blood circulates through a lattice of fine capillaries above the surface of the alveoli. Oxygen from the air flows into the bloodstream inside the alveoli, and carbon dioxide from the blood into the alveoli, both through the thin alveolar membrane.
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