Eyelids - Eyelids

Japanese: まぶた(瞼) - まぶた

Also called the eyelid. A fold that covers the front of the eyeball from above and below. It develops in vertebrates above amphibians. In animals other than mammals, only the lower eyelid moves and closes. In humans, it is covered on the outside by skin and on the inside by the palpebral conjunctiva, between which are the orbicularis oculi muscle, which moves the eyelid, the levator palpebrae superioris muscle, and a cartilage plate called the tarsal plate. It protects the eyeball and spreads tears over the entire surface of the cornea. Eyelashes grow on the edge, and there is often a groove parallel to the edge, creating a double eyelid.
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Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

眼瞼(がんけん)とも。眼球の前を上下からおおうひだ。両生類以上の脊椎動物に発達する。哺乳(ほにゅう)類以外では下のまぶただけが動いて閉じる。ヒトでは，外面は皮膚，内面は眼瞼結膜でおおわれ，その間にまぶたを動かす眼輪筋，上眼瞼挙筋や瞼板という軟骨板を入れる。眼球を保護し，また涙を角膜の全面に行きわたらせる役をする。縁にはまつ毛がはえ，しばしば縁に平行な溝があって二重まぶたとなる。
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