Blood cells are produced in the bone marrow and the bone marrow is part of the skeletal system. So the answer would be skeletal system<em>. </em>
If a person blood sugar is 120 mg/mL that person already have diabetes mellitus. Diabetes mellitus is a medical condition in which the level of glucose in the blood is very high because the glucose were not able to enter the body cells. The condition is usually cause by absence or inadequate level of insulin in the body.
In physics, it’s called energy-transfer