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The term "ampulla" refers to a saclike cavity or dilated portion of a duct or blood vessel. In anatomy, it appears in several contexts:

  • Ductus Deferens: In the male reproductive system, the ampulla is an enlarged section of the ductus deferens that stores semen and contributes secretions.1
  • Fallopian Tube: In females, the ampulla is a wide section of the fallopian tube where fertilization typically occurs.2
  • Semicircular Canals: Within the inner ear's vestibular system, the ampullae are expanded ends of the semicircular canals containing sensory organs crucial for balance.3
  • Ampulla of Vater: This is a specific anatomical structure, also known as the ampulla of Vater.4
  • Ampullae of Lorenzini: These are specialized sensory organs in certain fish, like sharks and rays, that detect electric fields.5
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