Contributor: Kaitlyn Zimmerman. Lesson ID: 12810
How many hinges does it take to open and close a door? Count the hinges on the door, then add one more: the one in the arm you used! Learn about the hinges designed into your body that help you move!
Have you ever hit the side of your elbow and had it start tingling? If so, you probably hit your funny bone! It wasn't so funny, was it? In fact, it probably hurt! Did you know that the funny bone isn’t actually a bone? Instead, it is a nerve that is located on the inside of your elbow and is known as the ulnar nerve.
Go ahead and do a push-up.
That is a lot of push-ups!
Take a walk up and down the stairs.
We need the flexibility in our elbows and knees in order to move!
This may sound strange at first, so let’s join Dr. Jo to learn more!
Joints are very important structures in your body. Without them, you would hardly be able to move; instead, you would shuffle around and resemble something close to a robot! As you learned from Dr. Jo, both your elbow joints and knee joints are special joints known as hinge joints. This type of joint allows your body to do specific movements, such as running, climbing, and even standing up! Elbow and knee joints are only able to move in one plane.
Continue on to the Got It? section to find out!