Precursor Trysinogen is an inactive enzyme which is converted to Trypsin by the enterokinase from the ileum. It's then released into the duodenum by secretin from the gut walls or mucosa cells of the duodenum.
The deodenim, is part of the intestine.
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In anatomy of the digestive system, the duodenum is a hollow jointed tube about 25-30 cm (10-12 in) long connecting the stomach to the jejunum. It...