The human body is made up of many parts: bones, tissues, muscles, organs etc. Part of the organ family is the skin and it is the largest organ of the body. In Russian the word for skin is кожа.The word declines as such:

Here are a few sample sentences.

The skin protects us from diseases and germs that could get into our bloodstream. It has pores to help us to release heat in the summer and hair and layers to keep warm in the winter. There different tones of skins as well as different grades of how oily the skin is. Like any other part of the body it needs to be taken care of so it can look its best and do its job.