聲囊

聲囊，是無尾類分類的重要特徵，在口角處的開口，為聲囊孔.觀察聲囊孔的有無，則知聲囊存在與否.聲囊存在於兩口角外側，皮膚聲囊（ａ林蛙ｂ湖蛙）MM呈皺褶狀，鳴叫時薄膜囊突出的，稱外聲囊.外聲囊單個，位於咽下者，繁殖期，雄蛙的鳴聲，能吸引雌性共同移向繁殖場所，故為第二性徵之一.

大多數雄性無尾兩棲類咽部突出的薄膜囊.對聲音有共鳴作用，為第二性徵之一.聲囊是無尾類分類的重要特徵（見下頁圖）。聲囊在口角處的開口，為聲囊孔.觀察聲囊孔的有無，則知聲囊存在與否.聲囊存在於兩口角外側，皮膚聲囊（ａ林蛙ｂ湖蛙）MM呈皺褶狀，鳴叫時薄膜囊突出的，稱外聲囊.外聲囊單個，位於咽下者，如雨蛙類、姬蛙、狹口蛙、尖舌浮蛙等.外聲囊成對，位於咽下的有虎紋蛙、沼蛙、彈琴蛙等.外聲囊位於咽兩側的有黑斑蛙.聲囊伸於肌肉和皮膚之間，稱內聲囊.位於咽下具單個內聲囊者，如花背蟾蜍、棘腹蛙等.位於咽側有成對內聲囊者，如金線蛙、中國林蛙、峨眉樹蛙等.無聲囊的也能發音，但聲音細弱，如中華大蟾蜍.繁殖期，雄蛙的鳴聲，能吸引雌性共同移向繁殖場所，故為第二性徵之一.GOOGLE英文翻譯:Most of the male anuran amphibian prominent pharyngeal membrane sac. For the role of sound in sympathy for one of the secondary sexual characteristics. Anuran acoustic capsule is an important feature classification (see page chart). Sound sac in the mouth at the opening hole for the sound of capsule. Observe the presence or absence of acoustic capsule hole, then the presence or absence of known acoustic capsule. Acoustic capsule exists in the two lateral mouth, skin, sound capsule (a frog Rana b lake) MM fold was like, call and prominent capsule when the film, saying that outside the sound capsule. outside the sound of a single capsule, located in swallowing persons, rain frogs, Ji frogs, narrow-mouth frog, floating frogs and other sharp tongue. outside the sound of capsule pairs, swallowing are located in tiger frog, marsh frog, frog piano and so on. outside the sound of capsule are located on both sides of the pharynx nigromaculata. acoustic capsule stretch between the muscle and skin, said capsule within the sound. located in a single swallow capsule of sound persons, flowery back toads, frogs and other abdominal spines. in the pharyngeal pouch by side Youcheng internal sound, such as the golden frog, Chinese forest frog, tree frog, etc. Emei. silent capsule can also be pronounced, but the sound thin and delicate, such as the Chinese Bufo bufo. breeding period, the calls of Xiongwa can attract breeding females move together, and are thus one of the secondary sexual characteristics.