Answer: sry i learned this when i was in fifth grade its the vascular system
High homocysteine levels in the blood can damage the lining of the arteries. High levels may also make the blood clot more easily than it should. This can increase the risk of blood vessel blockages. A clot inside your blood vessel is called a thrombus. A thrombus can travel in the bloodstream. From there, it can get stuck in your:
Lungs (called a pulmonary embolism).
Brain (which can cause a stroke).
Heart (which can cause a heart attack).
Planning should include a definable goal. Learning goals and objectives must be defined <span>with expected short-term and long-term result that could be measured with data. By doing this, we could evaluate our effort to determine whether we're moving accordingly towards our schedule and determine whether we're still on track with our goals.</span>
I think that it is Lung cancer that is mainly caused by tobacco
B. Gown then D. Mask then C. Goggles then A. Gloves hope this helps :)