人、狗、鼠、兔均是恆溫動物，意思即是他們需要動用從新陳代謝中所獲取的能量來保持恆常體溫。617Please respect copyright.ＰＥＮＡＮＡSHilRZuD13
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在炎熱的天氣下，人及狗均能依靠流汗及喘氣作散熱的手段。617Please respect copyright.ＰＥＮＡＮＡLdkr8iiGvH
但鼠及兔皮下並沒有汗腺的關係，牠們沒有流汗的能力，同時亦沒有喘氣的習性。617Please respect copyright.ＰＥＮＡＮＡkIYQwBJiHh
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（圖2）在行為方面，鼠及兔只好依靠躲藏或擺出不同的身體姿勢作散溫或保暖用途。617Please respect copyright.ＰＥＮＡＮＡWxWpqX3WSW
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生理方面，鼠及兔能透過豎毛(Piloerection)，亦即是毛管戙來阻隔寒氣入侵，又或是擴張血管(Vasodilation)來加快散熱效能。617Please respect copyright.ＰＥＮＡＮＡU8r4K7gapH
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（圖3）老鼠的尾巴約佔全身皮膚面積5%左右，但約17%的體溫調節功能均是透過尾巴的血管擴張及收縮來控制。617Please respect copyright.ＰＥＮＡＮＡuvWc1nFbpD
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至於兔仔的耳廓(Auricle)，其表面的血管亦跟老鼠尾巴帶有著調節溫度的功能。617Please respect copyright.ＰＥＮＡＮＡBPNOa3Nh70
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。617Please respect copyright.ＰＥＮＡＮＡWkqkoVpIoL
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。617Please respect copyright.ＰＥＮＡＮＡzqFAZ3NFoV
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https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio617Please respect copyright.ＰＥＮＡＮＡdFw9ikQk5O
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。617Please respect copyright.ＰＥＮＡＮＡtZ0PzPdjP2
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