Blood – everyone's got it. In fact, an adult who weighs between 150 and 180 pounds has around 1.2 to 1.5 gallons of blood in their body. This makes up approximately 10% of an adult’s weight. Blood ...

Angela Myers is a freelance writer covering mental health, wellness and nutrition. She’s also conducted award-winning research on how to better communicate about sexual violence prevention and mental ...

Stress hormones are chemical messengers that play a role in the body’s physiological and behavioral responses to stress. Examples include catecholamines and cortisol. These hormones help initiate the ...