Did you mean the circulatory system?
The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that pumps blood around the body and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.
Answer:
during fall and winter it is darker and trees can't make as much food . the chlorophyll is no longer in the leaves so it starts to change color
The atmosphere in the Pacific Ocean starts to rot at the very bottom of the coast which causes a crack, causing an earthquake.
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The enemies of Rome were The Barbaricum.
Final Answer: What happened in Rome 161 AD when first enemies called The Barbaricum attack the Roman Empire
