Putin's rule by fear. Russian President Vladimir Putin listens during a meeting in the Novo-Ogaryovo residence, outside Moscow, Russia, Monday, March 2, 2015. Russian President Vladimir Putin listens during a meeting in the Novo-Ogaryovo residence, outside Moscow, Russia, Monday, March 2, 2015. One can't help but fear Vladimir Putin. Russian President Vladimir Putin wants the public to believe he doesn't benefit from the death of Boris Nemtsov, and some of the slain politician's anti-Kremlin allies seem inclined to agree.
Here are the three main parts of the excretory system and what they do:   The skin-it's responsible for producing sweat, which helps regulate the salt concentration in â¦ the body. When you sweat, the salt helps evaporate the water and, in turn, cools off the body.
In addition to the kidneys, the liver, skin,and lungs also have important roles in the excretion of waste from the body. Learning Objective. Key Points. The excretory system is a passive biological system that removes excess and unnecessary materials from the body, so as to help maintain homeostasis and prevent damage. It is responsible for the elimination of the waste products of metabolism, as well as other liquid and gaseous wastes.