linguistic:paraphrasing
Vital signs

Blood loss can be estimated based on heart rate, blood pressure, respiratory rate, and mental status. Blood is circulated throughout the body and all major organ systems through a closed loop system. When there is damage to the blood vessel or the blood is thinner than the physiologic consistency, blood can exit the vessel which disrupts this close-looped system. The autonomic nervous system (ANS) responds in two large ways as an attempt to compensate for the opening in the system. These two actions are easily monitored by checking the heart rate and blood pressure. Blood pressure will initially decrease due to the loss of blood. This is where the ANS comes in and attempts to compensate by contracting the muscles that surround these vessels. As a result, a person who is bleeding internally may initially have a normal blood pressure. When the blood pressure falls below the normal range, this is called hypotension. The heart will start to pump faster causing the heart rate to increase, as an attempt to get blood delivered to vital organ systems faster. When the heart beats faster than the healthy and normal range, this is called tachycardia. If the bleeding is not controlled or stopped, a patient will experience tachycardia and hypotension, which altogether is a state of shock, called hemorrhagic shock.