Normal pyloric sphincter. Endoscopic view of a healthy pyloric sphincter closing. A sphincter is a strong ring of muscle that can contract to control

---

Normal pyloric sphincter. Endoscopic view of a healthy pyloric sphincter closing. A sphincter is a strong ring of muscle that can contract to control the opening of a body passage. The pyloric sphincter controls the passage of digested food from the pylorus of the stomach to the duodenum - the first section of the small intestine.

---

Size: 3173px × 2776px
Photo credit: © GASTROLAB/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: africa, animal, bee-eater, biological, biology, bird, desert, fauna, hirundineus, kalahari, merops, nature, nest, ornithological, ornithology, single, south, swallow-tailed, wildlife, zoological, zoology