Enumerated powers. The enumerated powers are a list of items found in Article I, Section 8 of the U.S. Constitution that set forth the authority of Congress. In summary, Congress may exercise the powers that the Constitution grants it, subject to the individual rights listed in the Bill of Rights.
The average adult has 10-12 pints of blood. Someone needs blood every two seconds in the U.S. 40,000 pints: Amount of donated blood used each day in the U.S. and Canada. Through a process of separating blood into its individual parts, a single unit of blood can help extend the lives of as many as three people.
Fact: The time taken for a single donation session is normally not more than an hour or so. Myth: There is limited blood in the body and it is unhealthy to give some away. Fact: Only about 350-450ml of blood is taken during a donation session. There is enough blood in the body to donate it without any ill effects.