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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 ...
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 ...
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 ...
Like the other epithelial cell lineages in the small intestine, Paneth cells originate at the stem cell region near the bottom of the gland. [4] There are on average 5–12 Paneth cells in each small intestinal crypt. [5] Unlike the other epithelial cell types, Paneth cells migrate downward from the stem cell region and settle just adjacent to ...
For decades, it was believed that the main function of the glands is to secrete alkaline (bicarbonate-containing) mucus in order to: [citation needed] protect the duodenum from the acidic content of chyme (which enters the duodenum from the stomach), provide an alkaline environment which promotes the activity of intestinal enzymes,
The intestinal epithelium is the single cell layer that forms the luminal surface (lining) of both the small and large intestine (colon) of the gastrointestinal tract.Composed of simple columnar epithelium its main functions are absorption, and secretion.
Enterochromaffin (EC) cells (also known as Kulchitsky cells) are a type of enteroendocrine cell, and neuroendocrine cell.They reside alongside the epithelium lining the lumen of the digestive tract and play a crucial role in gastrointestinal regulation, particularly intestinal motility and secretion. [1]
or straight tubular [4] the gland is a uniform tube Small intestine (Crypts of Lieberkühn), uterine glands: coiled tubular or simple coiled tubular [5] the gland is coiled without losing its tubular form sweat glands: simple branched tubular [6] or compound tubular [7] branching occurs in the tubes pyloric glands of stomach