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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 ...
Cells are produced at the crypt base and migrate upward along the crypt axis before being shed into the colonic lumen days later. [8] There are 5 to 6 stem cells at the bases of the crypts. [8] As estimated from the image in panel A, there are about 100 colonic crypts per square millimeter of the colonic epithelium. [10]
Lysozyme is an antimicrobial enzyme that dissolves the cell walls of many bacteria, and phospholipase A2 is an enzyme specialized in the lysis of bacterial phospholipids. [10] This battery of secretory molecules gives Paneth cells a potent arsenal against a broad spectrum of agents, including bacteria, fungi and even some enveloped viruses .
"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.'"
ESPN’s contract is with the SEC. Dan Lanning: “That’s how it works. Let’s not pretend it doesn’t work different than that.” Also, a message for three-loss teams whining and complaining ...
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 ...
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 ...