How does the endocrine system contribute to development across a lifespan?

The endocrine system plays a crucial role in development throughout a person's lifespan by regulating a wide array of biological processes through the release of hormones. Hormones are chemical messengers that travel through the bloodstream to target organs and tissues, influencing growth, metabolism, reproduction, and even mood and behavior.

From early development in the womb to old age, hormones guide critical functions such as the timing of puberty, the regulation of metabolic rates, and the maintenance of homeostasis. For example, during puberty, hormones like estrogen and testosterone promote the development of secondary sexual characteristics. Similarly, in adulthood, hormones are involved in processes such as stress response and reproductive cycles.

This comprehensive control by hormones illustrates how the endocrine system is fundamental to both physical and physiological development at every stage of life, establishing its importance well beyond the other options presented.