Search results
Results from the WOW.Com Content Network
The submucosa (or tela submucosa) is a thin layer of tissue in various organs of the gastrointestinal, respiratory, and genitourinary tracts. It is the layer of dense irregular connective tissue that supports the mucosa ( mucous membrane ) and joins it to the muscular layer , the bulk of overlying smooth muscle (fibers running circularly within ...
From the inner cavity of the gut (the lumen) outwards, these are the mucosa, the submucosa, the muscular layer and the serosa or adventitia. The mucosa is the innermost layer of the gastrointestinal tract. It surrounds the lumen of the tract and comes into direct contact with digested food .
It is approximately 1.5 centimetres (5 ⁄ 8 inch) in diameter in newborns after 35 weeks of gestational age, [7] and 2.5–3 cm (1– 1 + 1 ⁄ 8 in) in diameter in adults. On abdominal X-rays , the small intestine is considered to be abnormally dilated when the diameter exceeds 3 cm. [ 8 ] [ 9 ] On CT scans , a diameter of over 2.5 cm is ...
The submucosa consists of a dense and irregular layer of connective tissue with blood vessels, lymphatics, and nerves branching into the mucosa and muscular layer. It contains the submucous plexus , and enteric nervous plexus , situated on the inner surface of the muscular layer.
As soon as the tumors breach the basement membrane and reach the lamina propria, they are exposed to lymphatics which may increase the rate of metastasis and cancer progression. Deeper invasion into the submucosa will increase the exposure to lymphatics. [8] Long-standing inflammation is a risk factor for the development of cancer. The lamina ...
Like other structures of the gastrointestinal tract, the duodenum has a mucosa, submucosa, muscularis externa, and adventitia. Glands line the duodenum, known as Brunner's glands, which secrete mucus and bicarbonate in order to neutralise stomach acids. These are distinct glands not found in the ileum or jejunum, the other parts of the small ...
Around 800 to 1,000 minor salivary glands are located throughout the oral cavity within the submucosa [12] of the oral mucosa in the tissue of the buccal, labial, and lingual mucosa, the soft palate, the lateral parts of the hard palate, and the floor of the mouth or between muscle fibers of the tongue. [13]
The gut-associated lymphoid tissue lies throughout the intestine, covering an area of approximately 260–300 m 2. [5] In order to increase the surface area for absorption, the intestinal mucosa is made up of finger-like projections (), covered by a monolayer of epithelial cells, which separates the GALT from the lumen intestine and its contents.