“The EndoVac system removed considerably more debris from narrow isthmi in mandibular mesial roots.”
“A contradictory picture has developed within a limited number of brain studies in fish that have examined the connections between Nucleus Isthmi and the Optic Tectum.”
“All three of these isthmuses are bisected by canals to facilitate shipping.”
“Unquestionably the two most famous isthmuses are the Isthmus of Panama, connecting North and South America, and the Isthmus of Suez, connecting Africa and Asia.”
“Both these isthmuses are very narrow compared to the bulk off the landmasses they unite.”