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