First is the brain, spinal cord, and heart begin to develop. Then A blood vessel forms which will later develop into the heart and circulatory system.
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Besides solar fluctuations, the amount of radiation is also affected by small particles called aerosols. The more aerosols are present in the atmosphere, the less solar radiation reaches the Earth. Large quantities of aerosols actually help to cool down the Earth and to temper ('dim') the greenhouse effect.
Explanation:
D, therapist's can make a flexability program to fit any individual!
Answer:
Nicotine is a dangerous and highly addictive chemical. It can cause an increase in blood pressure, heart rate, flow of blood to the heart and a narrowing of the arteries (vessels that carry blood). Nicotine may also contribute to the hardening of the arterial walls, which in turn, may lead to a heart attack.
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