How do goosebumps and shivering keep you warm?

Goosebumps and shivering are physiological responses that help regulate body temperature in cold conditions. Goosebumps occur when tiny muscles at the base of hair follicles contract, causing hair to stand upright, which creates an insulating layer of air. Shivering involves rapid muscle contractions that generate heat, increasing body temperature. Together, these responses help maintain warmth by minimizing heat loss and producing additional heat.