How does the body act if there's internal hemorrhage?

Internal hemorrhaging can have several consequences: the heart rate will rise to try and maintain blood pressure and blood flow (perfusion) to vital organs, the blood pressure will fall if enough bleeding occurs, the hemoglobin will drop (anemia) and this reduces the amount of oxygen that can be carried by the blood to all body parts. This can then lead to to end organ ischemia which can lead to organ failure (heart attack, kidney failure, brain injury, etc). Also, the mass effect of internal bleeding can cause severe problems. For example, if one bleeds into the sack around the heart, the mass effect of this blood can cause pericardial tamponade and result in low blood pressure and even death with relatively small amount of blood loss into this closed space. This is likely what killed Steve Irwin when he was stung by the stingray in the chest. Internal hemorrhaging can have several consequences: the heart rate will rise to try and maintain blood pressure and blood flow (perfusion) to vital organs, the blood pressure will fall if enough bleeding occurs, the hemoglobin will drop (anemia) and this reduces the amount of oxygen that can be carried by the blood to all body parts. This can then lead to to end organ ischemia which can lead to organ failure (heart attack, kidney failure, brain injury, etc). Also, the mass effect of internal bleeding can cause severe problems. For example, if one bleeds into the sack around the heart, the mass effect of this blood can cause pericardial tamponade and result in low blood pressure and even death with relatively small amount of blood loss into this closed space. This is likely what killed Steve Irwin when he was stung by the stingray in the chest.