JEJUNUM Meaning and
Definition
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The jejunum is a vital part of the small intestine, situated between the duodenum and the ileum. It is the middle section of the small intestine and plays a crucial role in the process of digestion and absorption. The word "jejunum" originates from the Latin term "jejunus," which means "empty," as it was originally believed to be empty after death due to its lack of fat.
Anatomically, the jejunum is around 2.5 meters long in adults and is responsible for the majority of nutrient absorption, especially carbohydrates, proteins, and fats. It has a velvety texture and is lined with finger-like projections called villi, which greatly increase the surface area for absorption. The walls of the jejunum also contain numerous tiny blood vessels and lymphatic vessels that efficiently transport nutrients.
The muscular walls of the jejunum contract in rhythmic motions called peristalsis, propelling the food particles further into the digestive tract. This facilitates the mixing of partially digested food with digestive juices, such as bile and pancreatic enzymes, aiding in the breakdown of nutrients into absorbable forms.
Overall, the jejunum acts as a crucial site for absorption, ensuring that digested nutrients are taken up by the body for energy production, growth, and repair. Without the jejunum, the body would struggle to obtain essential nutrients, leading to malnutrition and various health complications.
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Intestinum jejunum, the portion of small intestine, about 8 feet in length, between the duodenum and the ileum.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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A part of the small intestines, so called because often found empty.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Common Misspellings for JEJUNUM
Etymology of JEJUNUM
The word "jejunum" has its origins in Latin. It comes from the Latin word "jejunus", which means "empty" or "hungry". The term was coined by the ancient Greek physician Galen, who described the organ as looking empty or hungry during dissection. The word "jejunal" is an adjective derived from "jejunum" and is used to describe anything related to or associated with the jejunum, such as jejunal arteries or jejunal ulcers.
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