Mucosa of the rectoanal junction
The rectum is lined with the same columnar epithelium that borders the bulk of the gastrointestinal tract’s secretory and absorptive sections. The anus, on the other hand, has a stratified squamous epithelium that protects the underlying tissue better.
Circular folds (plicae circulares) of the jejunum.
The jejunum is the small intestine’s middle section. It is located between the duodenum (the first section of the small intestine) and the ileum (last part of the small intestine). The jejunum aids in the digestion of meals from the stomach. It absorbs nutrients (vitamins, minerals, carbs, fats, proteins), as well as water, from meals so that the body may utilise them.
Pancreatic acini
The pancreas is a small organ in the abdomen. It has responsibilities in converting the food we ingest into energy for our bodies’ cells. The pancreas has two primary functions: exocrine digestion and endocrine blood sugar regulation.
Mucosa of the rectoanal junction
The rectum is lined with the same columnar epithelium that borders the bulk of the gastrointestinal tract’s secretory and absorptive sections. The anus, on the other hand, has a stratified squamous epithelium that protects the underlying tissue better.
Circular folds (plicae circulares) of the jejunum.
The jejunum is the small intestine’s middle section. It is located between the duodenum (the first section of the small intestine) and the ileum (last part of the small intestine). The jejunum aids in the digestion of meals from the stomach. It absorbs nutrients (vitamins, minerals, carbs, fats, proteins), as well as water, from meals so that the body may utilise them.
Pancreatic acini
The pancreas is a small organ in the abdomen. It has responsibilities in converting the food we ingest into energy for our bodies’ cells. The pancreas has two primary functions: exocrine digestion and endocrine blood sugar regulation.
Sources:
https://columbiasurgery.org/pancreas/pancreas-and-its-functions
https://www.cancer.gov/publications/dictionaries/cancer-terms/def/jejunum
http://medcell.med.yale.edu/histology/gi_tract_lab/recto_anal_junction.php