弄清宝宝为何泪水涟涟之前,首先要清楚眼泪的“来龙去脉”。眼泪由泪腺分泌,主要的泪腺位子眼眶上方的泪窝内,还有结膜的附属泪腺,泪腺分泌的泪液经过泪道,包括泪点、泪小管、泪囊、鼻泪管(最后鼻泪管开口千鼻腔的下鼻道)。当泪腺受到刺激而大量分泌时,眼泪可进入泪囊后经鼻泪管到达下 Find out why the tears of tears before the baby, we must first clear tears “origin and age ”. Tear is secreted by the lacrimal gland, the main lacrimal gland is located above the orbit of the lacrimal gland, and the lacrimal gland is attached to the conjunctiva. The lacrimal gland secretes tears through the lacrimal duct, including punctum, lacrimal duct, lacrimal sac, nasolacrimal duct Thousands of nasal lower nasal passages). When the lacrimal gland is stimulated and a large number of secretion, the tears can enter the lacrimal sac by the nasolacrimal duct to reach the next