passageways

Three elements cinched it: The views from the road above were stunning, the piazza charmed, and what would become something of a location star for rapt viewers, “the incredible network of stairs, alleys and passageways.”

“They’re filled with the bones of dead Parisians. When I lived here, that’s how I got around. Mother and I escaped through one of the passageways.”

They force air through a mask to keep mouth and nasal passageways open during sleep.

Mount Sinai researchers have published the first study to use single-cell analysis in identifying several pathophysiological mechanisms of abnormal passageways in the digestive system known as perianal fistulae, a common complication of Crohn's disease.

The team is confident the three areas can be connected, physically via the plumbing and by particular passageways, but also in terms of their ownership.