The jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds. source
The jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds.
The jejunum lies between the duodenum and the ileum. source
The jejunum lies between the duodenum and the ileum.
The jejunum is considered to begin at the attachment of the suspensory muscle of the duodenum to the duodenum. source
The jejunum is considered to begin at the attachment of the suspensory muscle of the duodenum to the duodenum.
The division between the jejunum and ileum is not anatomically distinct. source
The division between the jejunum and ileum is not anatomically distinct.
In adult humans, the small intestine is usually 6-7m long, about two-fifths of which (2.5 m) is the jejunum. source
In adult humans, the small intestine is usually 6-7m long, about two-fifths of which (2.5 m) is the jejunum.
The villi in the jejunum are much longer than in the duodenum or ileum. source
The villi in the jejunum are much longer than in the duodenum or ileum.
The pH in the jejunum is usually between 7 and 9 (neutral or slightly alkaline). source
The pH in the jejunum is usually between 7 and 9 (neutral or slightly alkaline).
The jejunum and the ileum are suspended by mesentery which gives the bowel great mobility within the abdomen. source
The jejunum and the ileum are suspended by mesentery which gives the bowel great mobility within the abdomen.
The jejunum contains circular and longitudinal smooth muscle which helps to move food along by a process known as peristalsis. source
The jejunum contains circular and longitudinal smooth muscle which helps to move food along by a process known as peristalsis.
If the jejunum is impacted by blunt force the emesis reflex (vomiting) will be initiated. source
If the jejunum is impacted by blunt force the emesis reflex (vomiting) will be initiated.
The jejunum contains very few Brunner's glands (found in the duodenum) or Peyer's patches (found in the ileum). source
The jejunum contains very few Brunner's glands (found in the duodenum) or Peyer's patches (found in the ileum).
The jejunum has many large circular folds in its submucosa called plicae circulares which increase the surface area for nutrient absorption. source
The jejunum has many large circular folds in its submucosa called plicae circulares which increase the surface area for nutrient absorption.
There is no line of demarcation between the jejunum and the ileum. source
There is no line of demarcation between the jejunum and the ileum.
The jejunum has less fat inside its mesentery than the ileum. source
The jejunum has less fat inside its mesentery than the ileum.
The jejunum is typically of larger diameter than the ileum. source
The jejunum is typically of larger diameter than the ileum.
In fish, the divisions of the small intestine are not as clear and the terms middle intestine or mid-gut may be used instead of jejunum. source
In fish, the divisions of the small intestine are not as clear and the terms middle intestine or mid-gut may be used instead of jejunum.
