EPISODE · Apr 8, 2026 · 19 MIN
廁所裡的科學 - 憋尿與排便的精密工程
from 『身體不思議』Amazing Facts of Human Body · host 解剖知識+
今天要帶你揭開廁所裡的機密！原來大小便全是靠肌肉們的完美合作。自律神經控制的內括約肌總想著「開閘放水」，幸好有大腦指揮的「外括約肌」幫你死守最後防線，才不會走到哪拉到哪！坐上馬桶時，平時用 90 度彎角死掐著直腸防漏的神奇「提肛肌」，這時才肯開門放行，再加上腹肌幫忙使勁擠壓，最後終於能種下一坨坨你的生物痕跡呢！在這兒還要提醒各位新手爸媽，兩歲以下小小孩的括約肌神經根本還沒發育好，別逼他們戒尿布啦，人家是真的「心有餘而力不足」喔！ 留言告訴我你對這一集的想法： Powered by Firstory Hosting
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廁所裡的科學 - 憋尿與排便的精密工程
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