What does blood deliver to every part of the body?

I believe the answer is: Hemoglobin which carries oxygen

Oxygen becomes the main source of energy for our body to operate its daily function. The blood would bind the oxygen that taken in from the longs and distributed them to various parts of our body as it circulates from the pump of our heart.

Blood can be defined as a tissue that is made up of white blood cells, platelets, plasma, red blood cells and other components. About 1-1½ gallons (4 to 6 liters) of blood is circulated in the body and the heart pumps the whole volume of blood every minutes.

Thus, blood is known to deliver oxygen and nutrients to the rest of the body while waste products and carbon dioxide produced were removes from the body. During metabolism, oxygen is transported in the blood from the lungs to the cells of the body while carbon dioxide during these processes is transported back to the lungs by the blood.

However, blood also play other important functions in the body by regulating acid-base (pH), electrolytes and temperature.