Respuesta :
The given statement is true.
• From the mouth and nose air gets into the lungs through the trachea, also known as the windpipe.
• The trachea further divides into two tubes known as bronchi. The bronchi further differentiates into smaller tubes known as bronchioles, when then terminates into microscopic air sacs or alveoli.
• The alveoli are enveloped with mucus, and are encircled by a network of blood capillaries. These capillaries exhibit very thin walls that helps in the absorption of gases. An individual air sac is known as an alveolus.
• The moisture layer in the alveoli permits the gases to dissolve so that they can diffuse briskly.
• The alveoli possess a very good supply of blood, and a very large total surface area. The blood supply is provided by the dense network of capillaries, which encircle them.
• There is an interchange of gases between the alveoli and the capillary blood vessels surrounding it.
• The diffusion of oxygen takes place from the alveoli into the blood, and carbon dioxide diffuses from the blood into the alveoli.
• The mentioned characteristics are mainly essential for the lungs to exhibit efficient exchange of gases.
Thus, it can be said that the lungs posses an efficient blood supply to take away the oxygenated blood and sustain the concentration gradient.
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