Continuous repair and maintenance of structures are necessary to counteract the effects of environmental disruptions and prevent the breakdown of cellular organization, which is essential for life.

Environmental factors can disrupt the organized nature of living structures over time, leading to breakdowns in cellular organization and function.

Viruses lack inherent metabolic activity and do not exhibit molecular movement until they infect host cells. This lack of autonomous molecular movement raises questions about whether viruses meet all criteria for life.

Heterotrophic organisms obtain energy and materials by consuming other organisms or organic matter, breaking down complex substances into simpler ones that can be used for maintenance, growth, and reproduction.

Energy is necessary to maintain vital functions such as circulation, respiration, and cellular repair, even when we are not actively engaged in physical activity.