Bacteria is something else that you would need to know
I think the circulatory system is the best body system because we need the heart to stay alive, many people live with only one lung. but we need the respiratory system to let oxygen in, and let carbon dioxide out.
To prevent<span> the </span>risk<span> of </span>injury<span> from </span>slips<span>, </span>trips<span>, or </span>falls due<span> to </span>clutter<span>, </span>you should<span> organize </span>storage areas<span> and secure </span>cords<span> and </span><span>cables</span>
