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I don't know. It seemed like we were doing anatomical parts as questions so I thought I'd throw this one in....;-D...
https://en.wikipedia.org/wiki/Pancreatic_islets
https://en.wikipedia.org/wiki/Adrift_Just_Off_the_Islets_of_Langerhans
I heard of them years ago from Fireside Theatre. They were referring to a cruise around the beautiful Islets of Langerhans. I always loved that anatomical term after that. One of my great all-time faves.
The pancreatic islets or islets of Langerhans are the regions of the pancreas that contain its endocrine (i.e., hormone-producing) cells, discovered in 1869 by German pathological anatomist Paul Langerhans.[2] New studies show that the pancreatic islets constitute approximately 4.5% of the pancreas volume[1] and receive 10-15% of its blood flow.[3] The islets of Langerhans are arranged in density routes throughout the healthy human pancreas.[1]
I'm familiar with the term because of the title of the Harlan Ellison story, although I don't remember actually reading it.
Most people don't know Harlan. At least you know who he IS. Those Islets are partially responsible for controlling diabetes. https://en.wikipedia.org/wiki/Pancreatic_islets