Lungs

the lung (adjectival form: pulmonary) is the essential respiration organ in many style-breathing animals, including most tetrapods, a a few(prenominal) fish and a few snails. In mammals and the more complex life forms, the twain lungs ar located near the backbone on each font of the heart. Their principal function is to transport oxygen from the atmospheric utter into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere. This exchange of gases is accomplished in the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs called alveoli. To in all explain the anatomy of the lungs, it is necessary to discuss the race of air with the verbalize to the alveoli. Once air progresses through the mouth or nose, it travels through the oropharynx, nasopharynx, the larynx, the trachea, and a progressively subdividing constitution of bronchi and bronchioles until it last reaches the alveoli where the gas exchan ge of carbon dioxide and oxygen takes place. The potation and protrusion of air (ventilation) is driven by muscular satisfy; in early tetrapods, air was driven into the lungs by the pharyngealmuscles via buccal pumping, whereas in reptiles, birds and mammals a more complicated musculoskeletal governance is used.

checkup terms related to the lung often begin with pulmo-, from the Latin pulmonarius (of the lungs), or with pneumo- (from Greek ??????? lung). The lungs of mammals have a spongy and modest food grain and are honeycombed with epithelium, having a untold larger go up celestial sphere in total than the outer surface are a of the lung itself. The lungs of humans ar! e a typical example of this showcase of lung. Breathing is generally driven by the muscular stop at the scum bag of the thorax. Contraction of the diaphragm pulls the bottom of the dental caries in which the lung is enclosed downward, increasing volume and thus diminish pressure, do air to flow into the airways. Air enters through the spoken and pinched cavities; it flows...If you want to get a full essay, fiat it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay