分泌囊

在柑桔類的葉和果皮以及桉樹葉等植物上，所見到的常稱為“油點”的分泌囊.它們是由一些分泌細胞形成的腔室（囊），所以亦稱“分泌腔”。這些腔室內的分泌物，大多是揮發油，故又稱“油室”。分泌囊可分為兩類：（1）裂生式，在分泌細胞層當中裂開、彼此分離形成，分泌細胞完整地圍繞着腔室，如當歸、金絲桃、漆樹等.（2）溶生式，分泌細胞因分泌物累積增多，原生質減少，使細胞壁破裂溶解，腔室周圍的細胞常破碎而不完整，常見於陳皮、棉、桉樹以及柑桔類等的葉和果皮上.

In citrus leaves and peel and eucalyptus leaves, plants, seen often referred to as "oil spot" sac secretion. They are formed by a number of chamber-secreting cells (capsule), so also known as "secretion cavity. " The chamber of secretions, mostly volatile oil, so called "oil-room." Secretory sac can be divided into two categories: (1) cleavage-type, in the secretory cell layer were split, mutual separation of the formation of secretory cells surrounded by a full chamber, such as angelica, Hypericum, sumac, etc.. (2) dissolved Health type, secretory cells due to accumulation of secretions increase, protoplast reduced, and thus rupture the cell wall dissolves chamber surrounding the cells often broken and not complete, is commonly found in tangerine peel, cotton, eucalyptus, and citrus peel on the leaves and so on.