嬰兒為什么不怕冷？

發(fā)布時(shí)間：[2025-02-21] 閱讀：[152]次作者：萊西暖心家政公司

暖心家政時(shí)刻準(zhǔn)備等你約 0532-58739843

嬰兒其實(shí)是不怕冷的，因?yàn)門A們身上獨(dú)有一種神奇的物質(zhì)
▼
褐色脂肪！
　　褐色脂肪（Brown Fat），是動(dòng)物體內(nèi)一種主要儲(chǔ)存中小型脂肪滴的脂肪細(xì)胞，可以產(chǎn)生身體的熱能。它燃燒耗能大概是肌肉組織燃燒耗能的5倍以上，而成年人身體里含有的褐色脂肪非常少，主要分布在脂肪比較薄的地方如脖子、鎖骨、肩膀部位。這些地方?jīng)]有脂肪保護(hù)，需要熱量比較快的產(chǎn)生，而新生兒體溫調(diào)節(jié)機(jī)制還不成熟，褐色脂肪的神奇就在于它在新生兒的體內(nèi)比例非常高，這樣就可以保證新生兒體內(nèi)的褐色脂肪產(chǎn)生足夠多的熱量。不至于讓他們受凍。

　　大自然的設(shè)計(jì)就是這么奇妙，他會(huì)為寶寶設(shè)計(jì)好天然的乳汁，也會(huì)為寶寶設(shè)計(jì)好褐色脂肪。當(dāng)寶寶離開媽媽溫暖的子宮，褐色脂肪就會(huì)產(chǎn)生熱能，幫助寶寶適應(yīng)這“寒冷”的新世界。而當(dāng)寶寶慢慢長(zhǎng)大，身體調(diào)節(jié)體溫的能力逐漸完善，褐色脂肪也會(huì)慢慢減少，到成年時(shí)，褐色脂肪的比例已經(jīng)減少到不足體重的2%。感謝上帝的創(chuàng)造！

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報(bào)名：嬰兒為什么不怕冷？

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嬰兒為什么不怕冷？

報(bào)名：嬰兒為什么不怕冷？

色欲色香久久综合网_国产欧美日韩亚洲αv_精品国产偷窥丝袜在线拍国_国产欧美va天堂在线观看视频

報(bào)名：嬰兒為什么不怕冷？