Hello and welcome back to the Curious Kid podcast. We got curious about bones way, way, way back in episode 15, which was 217 weeks ago.

It was our second ever listener suggestion episode, and it was our first episode

exploring a part of the human body. Today, more than four years later, we are going to learn

about another very important part of our bodies that work closely with bones. Let's get to it.

Mailbag! Mailbag. Hi, Jacob and Olivia. My name is Kozma,

and I am 10 years old, and my sister Kira is 7 years old. We live in Twain Heart, California. We love

your podcast. We listen to it every time we

drive to soccer or gymnastics practices. Our favorite episode is the one about soccer. Can you

please make an episode about the history of sports? We would love to hear about great inventor Tesla, too.

We are also interested in finding out more about the human body, especially muscles.

Keep up the great work.

Bravo.

Kozma and Kira.

That was an awesome email from listeners across the country from where we live.

We can't wait to learn all about muscles

this week for Cosma and Kira. Muscles are super important and they actually make up about 40%

of our body weight. There are well over 600 muscles in our bodies and you may have even heard

the names of some of our muscles before.

The question of the week is, where in the body can you find the deltoid muscles?

While you're thinking about the answer, let's start learning about muscles.

Anytime you move your body, the movement is controlled by muscles.

Also, even when you're not moving your body, there are still muscles in your body that are hard at work.

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