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How many countries are currently members of the United Nations?

193 countries There are 195 countries in the world today. Members of United Nations This total comprises 193 countries that are member states of the United Nations and 2 countries that are non-member observer states: the Holy See and the State of Palestine .

Why does Aspirin help during a heart attack?

Platelets are cells that clump together and help to form blood clots. Aspirin keeps platelets from clumping together, thus helping to prevent or reduce blood clots.  Asprin Prevents Heart Attack During a heart attack. Blood clots form in an already-narrowed artery and block the flow of oxygen-rich blood to the heart muscle.