Small intestine

Intestinum tenue

A coiled tube approximately 6 meters long consisting of three parts: duodenum (25 cm, C-shaped), jejunum (2.5 m, wider with thicker walls), and ileum (3 m, narrower with more Peyer's patches). The plicae circulares, villi, and microvilli progressively increase surface area.

Type Organ
Body System Digestive
Body Region Abdomen
Latin Name Intestinum tenue
FMA ID 7200

Function

The primary site of chemical digestion and nutrient absorption. Its enormous surface area (approximately 32 square meters) is achieved through circular folds, villi, and microvilli, enabling efficient absorption of carbohydrates, proteins, fats, vitamins, and minerals.

Clinical Significance

Celiac disease causes villous atrophy in response to gluten. Crohn's disease commonly affects the terminal ileum. Small bowel obstruction is a surgical emergency. Duodenal ulcers are more common than gastric ulcers.

Frequently Asked Questions

What is the Small intestine?
A coiled tube approximately 6 meters long consisting of three parts: duodenum (25 cm, C-shaped), jejunum (2.5 m, wider with thicker walls), and ileum (3 m, narrower with more Peyer's patches). The plicae circulares, villi, and microvilli progressively increase surface area.
What is the function of the Small intestine?
The primary site of chemical digestion and nutrient absorption. Its enormous surface area (approximately 32 square meters) is achieved through circular folds, villi, and microvilli, enabling efficient absorption of carbohydrates, proteins, fats, vitamins, and minerals.
What body system is the Small intestine part of?
The Small intestine is part of the Digestive.
What conditions affect the Small intestine?
Celiac disease causes villous atrophy in response to gluten. Crohn's disease commonly affects the terminal ileum. Small bowel obstruction is a surgical emergency. Duodenal ulcers are more common than gastric ulcers.
Where is the Small intestine located?
The Small intestine is located in the Abdomen region of the body.

Related Structures

1st arch mandibular endoderm endoderm of mandibular component 1st arch maxillary endoderm endoderm of maxillary component alimentary part of gastrointestinal system alimentary system anterior ectodermal midgut anterior intestinal portal fovea cardiaca anus anal opening associated mesenchyme of foregut-midgut junction baleen feeding system

Medical Disclaimer

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