It's the permanent ending of vital processes in a cell or tissue. (religion.blogs.cnn.com)
Many vital processes happen during sleep and we must make getting daily restorative sleep part of our lifestyle. (hawaiinaturopathicretreat.com)
Researchers now know our biological clocks help regulate sleep patterns, feeding behavior, hormone release, blood pressure and the body's temperature, among other vital processes. (scientificamerican.com)