The sound-production apparatus of f

The sound-production apparatus of frogs consists of the larynx and its vocal cords. This laryngeal apparatus is well developed in males, who also possess a vocal sac. In the majority of frogs, vocal sacs develop as a diverticulum from the lining of the buccal cavity (figure 19.18). Air from the lungs is forced over the vocal cords and cartilages of the larynx, causing them to vibrate.
Muscles control the tension of the vocal cords and regulate the frequency of the sound. 70cal sacs act as resonating structures and increase the volume of the sound.
The use of sound to attract mates is especially useful in organisms that occupy widely dispersed habitats and must come together for breeding. Because many species of frogs often converge at the same pond for loreeding, finding a mate of the proper species could be chaotic. Vocalizations help to reduce the chaos.

結果 (中文) 1:

青蛙的声音生产装置包括喉和其声带。在男性，还拥有一个声乐囊好研制这喉的装置。在大部分的青蛙，声乐囊发展作为憩室的颊腔 （图 19.18） 衬里。空气从肺部被被迫的声带和软骨的喉，导致他们震动。肌肉的声带张力控制和调节声音的频率。70cal 囊作为共振结构和增加音量的声音。声音来吸引异性的使用是在生物占领广泛分散的栖息地，必须走到一起的育种中尤其有用。因为许多种类的青蛙常常在同一池塘 loreeding 衔接，寻找伴侣的适当的物种可能会很混乱。发声法有助于减少混乱。

結果 (中文) 3:

青蛙的发声装置由喉部和声带组成。这种喉部装置是在男性中开发的，也有一个声带囊。在青蛙的大多数，声带囊发展为从口腔内膜憩室（图19.18）。空气从肺部迫使声带和喉软骨，引起振动。肌肉控制声带的张力和调节声音的频率。70cal囊作为谐振结构和增加声音的音量。声音的使用吸引配偶是特别有用的生物，占据了广泛的分散的栖息地，必须一起繁殖。因为许多种青蛙经常会聚在loreeding相同的池塘，找到伴侣的适当的物种可能会很混乱。发声有助于减少混乱。