龟头是这样用的？
参考：
https://www.nationalgeographic.com/science/article/this-chinese-turtle-urinates-through-its-mouth
https://www.sciencedaily.com/releases/2012/10/121011090643.htm
https://uchytel.com/Myotragus-balearicus?utm_source=
https://www.world-archaeology.com/features/myotragus-balearicus-extinction-of-mouse-goats/
https://earthlymission.com/myotragus-balearicus-balearic-islands-cave-goat-only-cold-blooded-mammal/
https://scienceinschool.org/article/2023/squid-dissection-activity-to-teach-cephalopod-anatomy/?utm_source
https://ioa.factsanddetails.com/article/entry-255.html
https://www.sciencedirect.com/science/article/pii/S2589004219305620#tbl1
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