List of anatomical isthmi

In anatomy, isthmus refers to a constriction between organs. This is a list of anatomical isthmi:


 * Aortic isthmus, section of the aortic arch
 * 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
 * Isthmus, the ear side of the eustachian tube
 * Isthmus, narrowed part between the trunk and the splenium of the corpus callosum
 * Isthmus, formation of the shell membrane in birds oviduct's
 * Isthmus lobe, lobe in the prostate
 * Isthmus of cingulate gyrus
 * Isthmus of fauces, opening at the back of the mouth into the throat
 * Isthmus organizer, secondary organizer region at the junction of the midbrain and metencephalon
 * Isthmus tubae uterinae, links the fallopian tube to the uterus
 * Kronig isthmus, band of resonance representing the apex of lung
 * Thyroid isthmus, thin band of tissue connecting some of the lobes that make up the thyroid
 * Uterine isthmus, inferior-posterior part of uterus