Inemphysema, the inner walls of the lungs' air sacs (alveoli) are damaged, causing them to eventually rupture. This creates one larger air space instead of many small ones and reduces the surface area available for gas exchange. Emphysema is a lung condition that causes shortness of breath. ...
What is the tissue type for the following structure of the heart? Sinus/veins What is the tissue type for the following structure of the heart? Right atrium How do you distinguish between a capillary and an alveolar sac in lung tissues? 1. Alveoli are air sacs in the lungs wh...
The avian respiratory system is separated into a lung (the gas exchanger) and the air sacs (the mechanical ventilators). The lung is intercalated between two functionally distinct sets of air sacs, a cranial and a caudal group. Avascular in nature, the air sacs are delicate, transparent, ...
Why does the lung have many air sacs?Question:Why does the lung have many air sacs?Air SacsIf you follow the branching tubes, called bronchi, all the way down into your lungs, you will see that they end with hundreds of tiny air sacs. These air sacs are called alveoli. Alveoli serve...
(vocal sacs); (3) sacs that branch off from the widened posterior end of the trachea (in male striped seals) or from the esophagus (in male walruses) and serve to alter the specific gravity of the body; and (4) in the sperm whale, a blind air sac about 1 cu m in size that ...
lungblåsa A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place. Strong connective tissue is essential to provide stability and elasticity to the tiny air sacs in the lungs. Stark bindväv är nödvändig för att ge ...
The meaning of AIR SAC is one of the air-filled spaces in the body of a bird connected with the air passages of the lungs.
Quantitative structure of the lung-air sac system in birds Silicon injection casts were used for the determination of the volumes of the lung and air sacs. The volumetric composition of the lung was analyzed at macroscopic lung slices for the fractional volume of the great bronchi, of the ...
superlungs evolved only in birds or earlier in dinosaurs.Unlike humans and other mammals, whose lungs expand and deflate(缩小), birds' lungs are rigid.Special air sacs(气囊) alongside the lungs do the heavy lifting instead, pumping air through the lungs, where the oxygen spreads into the ...
Pathway of respired gas in the air sac-lung apparatus of fowl and ducks. Respir. Physiol. 13: 330-342.BOUVEROTP. & DEJOURSP. (1971) Pathway o1" respired gas in the air sacs-lung apparatus of fowl and ducks. Respir. Physiol. 13, 330--342....