List of anatomical isthmi

• "Isthmus" the mesencephalon -rhombencephalon boundary.
• Isthmus faucium
• Isthmus glandularis or Thyroid isthmus
• Isthmus prostatae
• Isthmus tubae auditivae
• Isthmus tubae uterinae
• Uterine isthmus
• Isthmus urethrae
• Isthmus of the aorta
• Isthmus of the Oviduct
• Isthmus of the Rhombencephalon
• Isthmus of the Corpus Callosum
• Isthmus of the Cingulate Gyrus
• Cavo-tricuspid isthmus of the right atrium of the heart, a body of fibrous tissue in the lower atrium between the inferior vena cava, and the tricuspid valve.