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除肝臟外,胰腺是連接於消化道的最大腺體。它分頭、體和尾三部,在構造上包括兩種不同成分:一種是營外分泌功能的腺泡組織,其分泌液——胰液循胰導管流入十二指腸,幫助消化食物,是一種極重要的消化液;另一種是內分泌組織,散處於腺內,介於腺泡組織間,聚成小的細胞羣,並無導管通於外,稱為蘭氏小島或胰島,其分泌液直接釋放入血液中。這兩種組織(腺泡組織和胰島組織)是極容易被區別開的。
In addition to the liver, the pancreas is the largest gland that connects to the digestive tract. It is divided into three parts, the body and the tail, in the structure includes two different components: one is outside the secretion of acinar tissue, the secretion of liquid - pancreatic duct pancreatic duct into the duodenum, to help digest food, it is an extremely important Digestive juice; the other is the endocrine tissue, scattered in the gland, between the acinar tissue, into a small cell population, and no catheter in the outside, known as the Isle of Lang Island or islet, the secretion of the direct release into the blood in. The two tissues (acinar and islet tissue) are extremely easy to distinguish.