the point at which the trachea divides into the two mainstem bronchi is called the carina.
the point at which the trachea divides into the two mainstem bronchi is called the carina.
the point at which the trachea divides into the two mainstem bronchi is called the?
carina
bullet::::- carina of trachea, the point at which the trachea branches to form the two mainstem bronchi









































section::::astronomy.









































bullet::::- carina (chinese astronomy)









































bullet::::- carina (constellation), constellation









































bullet::::- carina dwarf, dwarf galaxy orbiting the milky way









































bullet::::- carina nebula (ngc 3372)









































section::::arts, entertainment, and media.









































bullet::::- "carina" (corrado lojacono song), 1958 song covered by sophia loren, dean martin and cliff richard









































bullet::::- "carina" (larz-kristerz song), a 2008 song by swedish band larz-kristerz









































bullet::::- carina press, the digital-only publishing house from harlequin enterprises









































section::::storms.









































bullet::::- cyclone carina, in the 2005–06 south-west indian ocean cyclone season
carina
during inhalation, environmental air initially enters the bird through the nostrils from where it is heated, humidified, and filtered in the nasal passages and upper parts of the trachea. from there, the air enters the lower trachea and continues to just beyond the syrinx, at which point the trachea branches into two primary bronchi, going to the two lungs. the primary bronchi enter the lungs to become the intrapulmonary bronchi, which give off a set of parallel branches called ventrobronchi and, a little further on, an equivalent set of dorsobronchi. the ends of the intrapulmonary bronchi discharge air into the posterior air sacs at the caudal end of the bird. each pair of dorso-ventrobronchi is connected by a large number of parallel microscopic air capillaries (or parabronchi) where gas exchange occurs. as the bird inhales, tracheal air flows through the intrapulmonary bronchi into the posterior air sacs, as well as into the "dorso"bronchi (but not into the ventrobronchi whose openings into the intrapulmonary bronchi were previously believed to be tightly closed during inhalation. however, more recent studies have shown that the aerodynamics of the bronchial architecture directs the inhaled air away from the openings of the ventrobronchi, into the continuation of the intrapulmonary bronchus towards the dorsobronchi and posterior air sacs). from the dorsobronchi the air flows through the parabronchi (and therefore the gas exchanger) to the ventrobronchi from where the air can only escape into the expanding anterior air sacs. so, during inhalation, both the posterior and anterior air sacs expand, the posterior air sacs filling with fresh inhaled air, while the anterior air sacs fill with "spent" (oxygen-poor) air that has just passed through the lungs.
bird anatomy