We identified vagally innervated structures in the air sac wall that resemble the neuroepithelial bodies (NEBs) described in the airways of many vertebrates. Although NEBs have been proposed to have a dual chemoreceptive and mechanoreceptive role, their specific function in the air sacs of birds ...
2024 Most people have either emphysema, which happens when air sacs in the lungs called alveoli don’t function properly, or chronic bronchitis — which happens when inflammation in the airways causes mucus to accumulate in the lungs. Lisa Rapaport, EverydayHealth.com, 27 Sep. 2024 Pneumonia ...
(4) posterior thoracic, on the dorsal side. The main function of the air sacs in birds is to draw air through the lungs, especially during flight, to regulate heat, and to alter the specific gravity of the birds while swimming and diving. Many skeletal bones in birds (femur, humerus, ...
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 ...
Dinosaur lung structure and ventilation of the abdominal air sacs in birds The purpose of this study was to identify any ostelogical features which might preventparadoxical movement (=lateral collapse) of the abdominal air sacs in... M Sapp - 《Air Sacs》 被引量: 2发表: 2004年 Evolution of...
What is the function of the air sacs? Air sacs serve asinternal compartments which hold air and facilitate internal air passage toallow birds to have a continuous flow of large volumes of air through the lungs as a way to increase oxygen exchange capacity and efficiency. ...
It has been well established that thyroid hormones play an important role in regulating the onset of puberty and reproductive function in birds. In mammals... Kirby,D J. - 《Biology of Reproduction》 被引量: 111发表: 1996年 Influence of Strong Diurnal Variations in Sewage Quality on the Perf...
Fig. 3. Schema of air flow in the respiratory tract of birds during both phases of ventilation. Broken arrow, uncertain. During inspiration, air flows via trachea and main bronchi (1) into the caudal air sacs (Th.P., Abd.) and (2) into the cranial air sacs (Clav., Th.A.)via dor...
In frogs, a pair of these sinuses lies subcutaneously over the sacral area, lateral to midline. Substances injected into these dorsal lymph sacs will be transported to the venous circulation (Fig. 9). Sign in to download full-size image Fig. 9. The paired dorsal lymph sacs (arrows) of ...
Birds, reptiles, mammals and birds have evolved diverselungstructures through which air flows in complicated ways. Birds and mammals are on extreme ends of the airflow spectrum. Mammals inhale oxygen-rich air that funnels into smaller branches, ending in tiny sacs where oxygen enters and carbon ...