Title: Abdomen (Anatomy): Definition, Function, Muscles | Biology Dictionary
Headings: Abdomen
Abdomen
Abdomen Definition
Abdomen Anatomy
Digestive Tract
Accessory Digestive Organs
Spleen
Urinary System
Abdomen Function
Respiration
Movement and Posture
Abdominal Muscles
Rectus Abdominis
Transverse Abdominal Muscle
Pyramidalis Muscle
Quiz
References
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Content: While the digestive organs and assessor organs are located within the peritoneum, the kidneys, ureters and urinary bladder are located outsider of the peritoneum, and thus, are considered by some scientists to be pelvic organs. Digestive Tract
The organs of the digestive tract consist of the small and large intestines, the stomach, cecum, and the appendix. The stomach is located between the esophagus and the small intestine in the upper left region of the abdomen. The stomach is responsible for the secretion of digestive enzymes and gastric acid required to digest food products. The small intestine is situated between the stomach and large intestine and consists of the three segments (duodenum, jejunum, and ileum), each exhibiting distinct functional properties. The duodenum is situated around the top of the pancreas and receives the digested stomach contents known as gastric chyme. The duodenum functions to neutralize the acid contained in the gastric chyme, as well as break down proteins and fat via enzymes and bile. The jejunum is the middle segment of the small intestine and is responsible for the absorption of sugar, amino acids, and fatty acids into the bloodstream. The final segment of the small intestine is the ileum, which connects to the large intestine. The ileum is responsible for the absorption of vitamin B12, as well as any remaining nutrients.