The role of blood is to carry nutrients and oxygen to our organs and our brain.
For a short answer, blood is sort of like a fuel, like gas to a car. If blood is not pumping through your system than you will die just like if gas is not pumping through a car's engine, it will break down.
The various cells of blood are made in the bone marrow.
Protein components of blood (including clotting proteins) are produced predominantly by the liver, while hormones are produced by the endocrine glands and the watery fraction is regulated by the hypothalamus and maintained by the kidney.
Answer: Your blood.
It makes blood cells.
Bones
It makes blood cells.
Your body makes more blood everyday.
the valve in the heart makes sure that blood moves around your body, it also makes sure that the blood travelling around your body is travelling int he right direction.
The human body makes its own blood, it is impossible to synthesize.
Red blood cells are manufactured in the bone marrow.
You heart pumps the blood round
Heart.
the heart pumps the blood to different part of the body
the heart pumps the blood to different part of the body