Answer:
PERIODS
Explanation:
As with any grid, the periodic table has rows running left to right, and columns running up and down. The rows are called PERIODS and the columns are called GROUPS.
The left side of your heart pumps oxygenated blood to your body.
The right side pumps blood to the lungs to receive the oxygen and it goes out of the left side to distribute it throughout the body.
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Cold can be caused by cold weather out side and the flu u can get from other people that are sick or bad living enviroments or rotton food
True most of the workers like cops , teachers , doctors need a college degree