the organ located within the duodenal loop in the mammal is
Duodenum The duodenum[help 1] is the first section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear, and the terms anterior intestine or proximal intestine may be used instead of duodenum.[5] In mammals the duodenum may be the principal site for iron absorption.[6]
Abdominal cavity The abdominal cavity is a large body cavity in humans[1] and many other animals that contains many organs. It is a part of the abdominopelvic cavity.[2] It is located below the thoracic cavity, and above the pelvic cavity. Its dome-shaped roof is the thoracic diaphragm, a thin sheet of muscle under the lungs, and its floor is the pelvic inlet, opening into the pelvis.