Final answer:
People with diabetes have a pancreas gland that does not produce enough insulin, resulting in high levels of sugar in their bodies.
Step-by-step explanation:
People who suffer from diabetes have a pancreas gland that does not produce enough insulin and sugar becomes toxic in their bodies.
In type 1 diabetes, the pancreas cannot make enough insulin because the body's own immune system attacks and destroys cells of the pancreas that secrete insulin. This condition is called an autoimmune disease. Without enough insulin, the blood contains too much sugar, which can damage blood vessels and cells throughout the body.
Type 2 diabetes, on the other hand, occurs when body cells are no longer sensitive to insulin. The pancreas may still make insulin, but the cells of the body cannot use it efficiently. This can also lead to high levels of glucose in the blood.