When you burst out crying, you expect the bleary red eyes and the rivers of tears that stream down your cheeks. But on top of all that, your nose starts to run like a faucet. Why does this happen? What’s the connection between crying and a runny nose?
Where Do Tears Come From?
Tears come from tear glands located just over the eye, behind the bone. As tears rinse down over your eye, they collect at the rims of your lower eyelids, where some may overflow and stream down your cheeks.
But that’s not the only escape route for overflowing tears. If you look very closely at the inside of your eyelid, right near your nose, you’ll see a tiny little hole. You might need to gently pull your eyelid down to see it, because it’s on the inner edge of the eyelid, resting against the eye.
River Tears
These little holes, on the upper and lower eyelids of both eyes, serve as drains and lead into canals that run through grooves in the bones of the face and eventually empty into the nose. Even when you’re not crying, some of the normal, everyday tears that moisten and clean your eyes drain out through this secret passageway into the nose, but it’s such a small amount that you don’t notice it.
When the tears really start to gush, however, this unnoticeable trickle turns into a river. As the tears make their way down through the nose, they moisten and loosen other secretions on the way. And that’s when you reach for a tissue!
哭的時候?yàn)槭裁磿鞅翘?
當(dāng)你放聲大哭時,朦朧的紅眼睛以及泉涌般的淚水沿著面頰滑落是預(yù)料之中的事。除此之外,你會開始流鼻涕。為什么會出現(xiàn)這種情況?哭和流鼻涕之間又有什么聯(lián)系呢?
眼淚從何而來?
眼淚是由位于眼骨后的淚腺分泌的。當(dāng)淚水被分泌出,他們便貯藏在下眼瞼邊緣,一部分眼淚溢出眼睛沿臉頰流下。
但那并不是眼淚流出來的唯一路徑。如果你仔細(xì)觀察眼瞼內(nèi)側(cè)靠近鼻子的地方,你會看到一個極其微小的洞。你可能需要輕拉眼瞼才能看到這個小洞,因?yàn)樗挥诳拷劬Φ难鄄€內(nèi)側(cè)。
淚流成河
這些小洞位于雙眼的上下眼瞼,它們發(fā)揮著排水管的作用,引導(dǎo)淚水沿著臉骨的凹槽流下并最終流入鼻子。即使你不哭的時候,每天也會有一些正常產(chǎn)生的、用以濕潤和清潔眼睛的眼淚通過這個秘密通道流到鼻子里,只不過它們數(shù)量太少你察覺不到而已。
當(dāng)眼淚噴涌而出的時候,這些平時察覺不到的小淚滴便匯流成河。在淚水流入鼻子的同時,它們在沿途還起到濕潤和疏松其它分泌物的作用,這時候,你就需要紙巾擦拭了。
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