题目内容 (请给出正确答案)
提问人:网友13***556 发布时间:2022年3月14日 19:49
[单项选择题]

下列与水生动物的呼吸器官鳃的有关叙述中,不正确的是()

A.鳃是皮肤向外延伸而成的专门用于气体交换的器官

B.流经鳃的水流方向与鳃内血管中的血流方向是相同的

C.鳃中的毛细胞血管的数量比上皮组织、肌肉组织中多得多

D.鳃的表面积非常大,有利于气体交换

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