The ampulla is a dilated portion of a tubular structure, typically found in the body. It can refer to various anatomical structures in different systems of the human body.
- Esophageal ampulla: A widening of the esophagus at its inferior end, just before it joins the stomach.
- Hepatopancreatic ampulla (Ampulla of Vater): The point where the common bile duct and the pancreatic duct unite and enter the duodenum.
- Ductus deferens ampulla: The terminal dilated portion of the ductus deferens (a tubular structure in the male reproductive system) where it joins the ejaculatory duct.
- Uterine ampulla: The wide middle section of the fallopian tube, where fertilization of the egg usually occurs.
- Seminal vesicle ampulla: The reservoir-like structure in the male reproductive system where sperm and seminal fluids mix before ejaculation.
The function of an ampulla may vary depending on its location within the body. In general, ampullae serve as storage or transitional areas, allowing for a more efficient flow or mixing of substances. They can also provide a protective environment for delicate structures or facilitate specific processes, such as fertilization or the release of secretions.