Nervous system
Circulatory system
Cardiovascular system
Answer:
I want to say it's radiation but I'm not sure
<span>Protected left turns are areas for turning that are controlled by a traffic signal or traffic sign. The traffic sign may be light.</span>
A green light means you may turn left. while <span>a red light means you must stop. Opposite to this, non protected left turns are not controlled by traffic sign.
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I believe this will help you.
http://www.nairaland.com/703151/why-did-islam-not-spread
