The correct answer is 1. Haematocrit is the volume percentage of red blood cells in whole blood. Haematocrit rises immediately after a severe burn and decreases with fluid replacement. Hematocrit levels are important for diagnosing and monitoring various medical conditions, such as anemia, dehydration, and burns.
Hemoglobin is crucial in transporting oxygen from the lungs to the body's tissues and carrying carbon dioxide back to the lungs.
Prothrombin plays a crucial role in the blood coagulation.