C. No one knew germs existed
Therefore diseases spread because they did not know how to prevent them and they did not have good hygiene.
<span>A. P wave is the correct answer</span>
Answer:
Nicotine
Explanation:
Smokeless tabacco may not damage your lungs but still has nicotine so it gives you the same addiction and withdraws when you try to quit.
Answer:
joy
Explanation:
is this rlly a question ???
Answer:
Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate.
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<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em></h2>