How do senescence and normal maturation differ during human life?

In the context of human biology and sociology, it is important to clarify that aging is a continuous, lifelong process rather than a phenomenon that only begins in later years. While the terms are often used interchangeably, they represent distinct aspects of the human life span:12

• Normal Maturation: This refers to the developmental stages of infancy, childhood, and adolescence, characterized by growth, the acquisition of physical and cognitive capacities, and the development of a coherent sense of self and social identity. Maturation involves the progression toward physical and psychological adulthood.13
• Senescence: This is the manifestation of the aging process that occurs throughout adulthood. It is defined by a progressive decline in biological functions and a reduced ability to adapt to metabolic stress. Physiologically, this includes a gradual loss of cells and reserve capacities in vital organs, leading to increased vulnerability to disease and mortality.124

Sociologically, while maturation focuses on integrating into society and establishing roles, aging involves ongoing adjustments to changing social interactions, health status, and life circumstances.53