When studying development, we often distinguish between three basic aspects or domains of development: physical, cognitive, and social-emotional.
Some uncontrollable risk factors for disease is genetics and exposure.
Men have a greater risk of heart attack then women do, and men have attacks earlier in life.
According to the Red Cross, people who have tattoos can donate blood. It's just that they would have to wait for 5 or 6 months after getting a tattoo before donating their blood. Same thing if you get your ears pierced.
