Answer: None. Nerves are not part of the circulatory system. They receive nutrients and oxygen from the circulation like any other part of the body, but there is no blood that "flows from the nerves".Tracy Morton MD
Answer: If you have lost a lot of blood you will feel light headed, dizzy, nauseous, and possible lose of conscientiousness. The best thing to do is to drink a lot of water/juices and eat something. You should probably get yourself to the hospital if you suspect you lost a life-threatening amount, but do not drive, have someone drive you or call an ambulance.
Answer: One would be dead or close to it. The person would be in severe shock and could be dying. This is an emergency situation. Losing two pints of blood is dangerous, much less 2 Liters. Call 911 if this is an emergency or see your healthcare professional for additional information pertaining to this question.This response has been given by a medical professional, but not a physician. Although this response has been checked for accuracy and has been researched, any advice given here does not take the place of your primary care provider. In an emergency, please dial 911 or your local emergency number. This response is provided under the terms and disclaimers of WikiAnswers and the author of this answer cannot be held liable for any misguided attempts to follow this advice without the observation or guidance of a licensed physician.