**Gray, SD. Cellular physiology of the vocal folds. The Otolaryngologic Clinics of North America. V.30. No. 4. pp 679-98. Aug 2000. The vocal folds are made up of three major layers from deep to superficial: 1.
As of 1 January 2017, the population of Russian Federation was estimated to be 146,389,999 people. This is an increase of 0.04 % (59,995 people) compared to population of 146,330,004 the year before. In 2016 the natural increase was negative, as the number of deaths exceeded the number of live births by 168,280.
Russia's population density is 8.4 people per square kilometre (22 per square mile), making it one of the most sparsely populated countries in the world. The population is most dense in the European part of the country, with milder climate, centering on Moscow and Saint Petersburg. 74% of the population is urban, making Russia a highly urbanized country