Blood is composed of red bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood cells, white bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood cells, plateletsPlatelets, also known as thrombocytes, are small cell fragments produced by the bone marrow. They play a crucial role in blood clotting by forming aggregates and clots to stop bleeding when blood vessels are damaged. >>, and plasma. Red bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood cells are responsible for transporting oxygen and carbon dioxide. White bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood cells make up our immune defense system. PlateletsPlatelets, also known as thrombocytes, are small cell fragments produced by the bone marrow. They play a crucial role in blood clotting by forming aggregates and clots to stop bleeding when blood vessels are damaged. >> contribute to bloodBlood is composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells are responsible for transporting oxygen and carbon dioxide. White blood cells make up our immune defense system. Platelets contribute to blood clotting, thereby preventing excessive bleeding.