Making the world better, one answer at a time. Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.he capillary is the only blood vessel where things can be  exchanged because it is so thin (one cell thick). Capillaries have  a single cell layer of squamous epithilium.
The day before the colonoscopy â Don't eat solid foods. Instead, consume only clear liquids like clear broth or bouillon, black coffee or tea, clear juice (apple, white grape), clear soft drinks or sports drinks, Jell-O, popsicles, etc. The day of the colonoscopy â As on the previous day, clear liquid foods only.
At 6 pm, drink one 8 oz. glass of the Miralax/Gatorade solution and continue drinking one 8 oz. glass every. 15 minutes. thereafter until the mixture is gone. Set a timer for every 15 minutes to keep pace. DAY OF YOUR COLONOSCOPY: Nothing to drink after midnight! You may take all of your morning medications as usual with 4 oz. of water up to 3. hours before your procedure. - 4 hours before, Only if instructed by your physician, drink 10 oz. of Magnesium Citrate. -. 3 hours before, stop drinking all clear liquids.