To what theory did Blood letting owe its origins?

Which list describe the aspects of health that should be in balance to archieve total wellness

An _ exposure is a repeated or prolonged exposure(over months or years) that may bring about slowly developing symptoms.

Heat affects all vitamins. which vitamins are more sensitive to heat and leach into water? a. vitamin a and d b. vitamin b and c c. vitamin e and k d. vitamin d and c