| 词条 | Lacrimal punctum | ||
| 释义 |
| Name = Lacrimal punctum | Latin = Puncta lacrimalia | Image = Gray895.png | Caption = The tarsal glands, etc., seen from the inner surface of the eyelids. (Puncta lacrimalia visible at center left.) | Image2 = Gray896.png | Caption2 = The lacrimal apparatus. Right side. Note outdated terminology: The "Lacrimal ducts" in Gray's are now called "Lacrimal canals". | System = | Precursor = }} The lacrimal punctum (plural puncta) or lacrimal point, is a minute opening on the summits of the lacrimal papillae, seen on the margins of the eyelids at the lateral extremity of the lacrimal lake. There are two lacrimal puncta in the medial (inside) portion of each eyelid. Together, they function to collect tears produced by the lacrimal glands. The fluid is conveyed through the lacrimal canaliculi to the lacrimal sac, and thence via the nasolacrimal duct to the inferior nasal meatus of the nasal passage. Additional imagesSee also
References{{Gray's}}External links
1 : Human eye anatomy |
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