In simplest terms, it can be said that the liver is located on the right side of the abdominal cavity, just below the diaphragm. In scientific terms, it is said to be located in the right upper quadrant of the abdominal cavity. The gallbladder is located to the exact back side of the liver in the human body.
Cucumbers are low in calories and high in vitamin K, anti-oxidants and potassium. Cucumber peel is a good source of dietary fiber that helps reduce constipation and offers some protection against colon cancers. I recently started eating most vegetables whole, raw and with the peel on.
Actually you need to cut one specific end -- the darker green side. The other one, even of cut, would have no liquid paste secretion on rubbing and would not reduce the bitterness. We grow cucumbers in my native village and when we pluck one to eat and have no knife to cut the bitter side, we start eating from the other side.