Isthmus (anatomy)

from Wikipedia, the free encyclopedia

The term isthmus (from ancient Greek ἰσθμός isthmós , German ` ` isthmus '' ) describes narrow areas of organs in anatomy .


  • Isthmus aortae (constriction of the aorta )
  • Isthmus faucium ( throat narrow )
  • Isthmus glandularis (narrow tissue bridge of the thyroid gland in humans and some other mammals)
  • Isthmus prostatae (narrow tissue bridge of the prostate )
  • Isthmus tubae auditivae (constriction of the ear trumpet )
  • Isthmus tubae uterinae (constriction of the fallopian tube )
  • Isthmus urethrae (constriction of the urethra )
  • Isthmus of the ovary
  • Isthmus in bony fish (Osteichthyes) the foremost part of the trunk muscles between the shoulder girdle and hyoid bone (hyoid)
  • Isthmus cordis ( pathway around the tricuspid valve annulus)