The body has mechanisms to alter or maintain blood pressure and blood flow. There are sensors that sense blood pressure in the walls of the arteries... My WebMD Sign In, Sign Up
Perhaps while we're not watching, the denizens of Dark Shadows carry-on, caught in another inter-dimensional wing of Collinwood. If you peer out the corner of your eye, you may catch a glimmer of this shadowy activity, perhaps in Dark Shadows Collection 14, or Dark Shadows Collection 22.
Watch Dark Shadows. The popular television show Dark Shadows delighted viewers when it introduced a new, supernatural element to regular television programming. The show centers around the strange and sometimes frightening Collins family, who live on a large estate called Collinwood in Maine.