WordGarden.iojejunum
C2Pronunciation
UK
- /dʒɪˈdʒuːnəm/noun
US
Meanings
Noun
the middle section of the small intestine
Beyond the definition
Imagine your digestive system as a long road with different stops. This section is the middle part of the small intestine, between the duodenum and the ileum. After food is broken down, this is one of the main places where your body takes in nutrients and moves them into the bloodstream. You can think of it as a busy transfer point, where much of the useful material from food gets picked up. Its name comes from the Latin word jejunus, meaning "empty," because early anatomists often found this part empty after death.
The jejunum is the middle section of the small intestine, located between the duodenum and the ileum. In humans, it makes up a large part of the small intestine and has an important job in absorbing nutrients. After food has been broken down in the stomach and then mixed with digestive juices in the duodenum, it passes into this section. There, sugars, amino acids, fatty acids, vitamins, minerals, and other nutrients are absorbed through a lining that has many folds and tiny finger-like projections called villi.
This part of the intestine does not work alone. It helps continue digestion while also giving the body a large surface area for absorption. Because of that, problems here, such as inflammation, blockage, injury, or disease, can lead to poor nutrient absorption and other digestive troubles. Doctors may examine it when a person has ongoing digestive symptoms or signs of malabsorption.
You will not hear this word often in everyday talk, but it appears regularly in medicine, anatomy, and discussions of digestion and nutrition. It names a specific part of the body, and understanding it helps explain how the body turns food into usable nourishment.
Examples
- 1
Digestive tract
Food passes from the stomach into the duodenum and then into the jejunum.
- 2
Medicine absorption
Most of this medicine is absorbed in the jejunum, so the dose may change after intestinal surgery.
- 3
Scan results
The scan showed swelling in a section of the jejunum, and the doctor ordered more tests.
See also
Contrast
- duodenum
- ileum
Used with (collocations)
- proximal jejunum
- distal jejunum
- jejunum and ileum
- resection of the jejunum
Word family
- jejunal
- jejuno-
Explore
- small intestine
- mesentery
Forms and spellings
1 form open this card.
Main spelling
- jejunumnoun