How could biting your nails make you sick?

<p>What is the purpose of finger &amp; toenails?&nbsp;If nails are made of dead cells, how do they grow?&nbsp;How do your nails reveal what's going on inside of you? For free home activities sign-up at www.WhoSmarted.com</p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>