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Leeuwenhoek and Kircher used a "simple microscope" for their work. A special form of the simple microscope was the compass microscope, which was built from the end of the 17th century. Like a pair of compasses, it had two legs, the distance between which could be adjusted in fine steps. On one leg was the objective lens, and the specimen was ...
The Crypts of Lieberkühn (intestinal glands) are named for him; he first described these in detail in De fabrica et actione vollorum intestinorum tenuium hominis, in 1745. Beyond this, Lieberkühn produced optical instruments such as compass microscopes with Lieberkühn reflector , further developing the light microscope , which he had seen ...
Colonic crypts (intestinal glands) within four tissue sections. In panel A, the bar shows 100 μm and allows an estimate of the frequency of crypts in the colonic epithelium. Panel B includes three crypts in cross-section, each with one segment deficient for CCOI expression and at least one crypt, on the right side, undergoing fission into two ...
The gastrointestinal tract is composed of numerous cell types that are important for immune activation and barrier surface defenses. The gastrointestinal epithelium is composed of enterocytes, goblet cells, Paneth cells, enteroendocrine cells, tuft cells, and stem cells.
General Motors said Tuesday it will retreat from the robotaxi business and stop funding its money-losing Cruise autonomous vehicle unit. Instead the Detroit automaker will focus on development of ...
Levothyroxine is a frequently prescribed drug in the United States, particularly for older people, as lower thyroid function can be associated with aging. Questions remain over how appropriately ...
"I waited for you to be like, 'Haha, JK.' No. Then you started pawing through my script, flipping each page, being like, 'I didn't laugh once. Not one time.'"
Crypts are anatomical structures that are narrow but deep invaginations into a larger structure. One common type of anatomical crypt is the Crypts of Lieberkühn. [1] However, it is not the only type: some types of tonsils also have crypts. Because these crypts allow external access to the deep portions of the tonsils, these tonsils are more ...