Part 3/8:

The human body's response to stress can be attributed to an evolutionary mechanism known as the "fight or flight" response, identified by Walter Cannon in the 1930s. This response enables quick, physical reactions to potential threats. When a person encounters danger, whether real or perceived, their body engages in a sophisticated cascade of physiological changes orchestrated by the Hypothalamic-Pituitary-Adrenal (HPA) axis.