mucosa is the layer of the digestive tract that is in direct contact with digested food.
mucosa is the layer of the digestive tract that is in direct contact with digested food.
which layer of the digestive tract is in direct contact with digested food?
mucosa
the gastrointestinal tract has a form of general histology with some differences that reflect the specialization in functional anatomy. the gi tract can be divided into four concentric layers in the following order:









































bullet::::- mucosa









































bullet::::- submucosa









































bullet::::- muscular layer









































bullet::::- adventitia or serosa









































section::::human gastrointestinal tract.:structure.:histology.:mucosa.









































the mucosa is the innermost layer of the gastrointestinal tract. the mucosa surrounds the lumen, or open space within the tube. this layer comes in direct contact with digested food (chyme). the mucosa is made up of:









































bullet::::- epithelium – innermost layer. responsible for most digestive, absorptive and secretory processes.
gastrointestinal tract
the well-preserved skeleton of the "sinocalliopteryx" holotype contained the partial leg of a dromaeosaurid within the abdominal cavity, comprising a complete lower leg and foot with toes and claws in their natural, articulated position. while the leg part, about one foot long, is very large in relation to the abdominal cavity, it is clearly situated within it, lying between the ribs. ji and colleagues in 2007 suggested that this could indicate it preyed upon the smaller, bird-like dinosaur. this discovery indicated that "sinocalliopteryx" may have been an agile, active, "fierce" predator, especially since other compsognathids have been found with (presumably fast-moving) lizards and small mammals in their abdominal cavities. in 2012 the dromaeosaurid was tentatively identified as an individual of "sinornithosaurus" with a length of 1.2 metres (3.9 ft). the 2012 study also reported newly discovered remains of prey animals. above the dromaeosaurid leg, feathers are visible. below it two clusters of digested food can be seen. it was suggested that the feathers had belonged to a bird and were with the leg still present in the stomach. the digested food would, using the preserved digestive tract of "scipionyx" as a reference, have been positioned in the duodenum. the c-shaped abdominal contents of this specimen appear to reflect of the original contour of the digestive tract.
sinocalliopteryx