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乳腺是一个非常复杂的器官,成熟乳腺主要由15～20个乳腺腺叶组成,乳腺腺叶由小乳管和10～100个腺泡及小叶间质构成,每个小叶通过一个导管系统引向乳头。其中,导管和腺泡被覆单层、具有分泌功能的管状上皮细
The breast is a very complex organ. The mature breast consists mainly of 15 to 20 mammary gland lobes. The breast glandular lobes consist of small ducts and 10 to 100 acini and interstitial mesenchyme, each leading through a catheter system nipple. Among them, the catheter and acinar monolayer covered with secretion of tubular epithelial cells