Epiglottis
The epiglotis is what allows you to swallow food without inhaling it. It acts as a gateway between the digestive and respiratory systems
A. moisten is the best answer u got
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Variability was seen as imperfection, so natural selection could only eliminate the inferior and imperfect, not giving rise to new things, new species.
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When calcium concentration increases during depolarization, it shifts the conformation of troponin and tropomyosin, and actin is able to associate with myosin. As calcium is taken up again by the sarcoplasmic reticulum the muscle cell relaxes.
<span>Pathogenic bacteria are the disease causing bacterias
Infection occurs when </span>viruses<span>, </span>bacteria<span>, or other </span>microbes <span>enter your body and begin to multiply. Disease, which typically happens in a small proportion of infected people, occurs when the cells in your body are damaged as a </span>result<span> of infection, and </span>signs and symptoms<span> of an illness appear.</span>
