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.
If youâre still queasy about the glow in the dark method; consider UV tattoos which also contain phosphorous. These are still invisible during the day, but only glow underneath a black light. So showing them off might be a little more difficult but theyâll look crazy tight, so its really up to you.