Lesson Plan - Get It!
If you were to throw a baseball, or scratch your back, side, and front, your shoulder would move in a lot of different directions. Do you know what kind of joint a shoulder joint is?
From throwing a baseball to climbing up a tree to helping vacuum the house, your shoulders do a lot of moving around.
- Have you ever noticed how you can move your shoulder joints in almost any direction?
Go ahead, give it a try. Reach above your head, in front of you, to the sides, and even behind you. Your shoulders can twist and turn so that you can reach in almost any direction.
- Have you ever noticed that your hip joint works in the same way, too?
Your hip joints have the mobility to move you from standing up to doing a split.
- Do you think our shoulder and hip joints are similar to the hinge joint you learned about in the last Bones Related Lesson, found in the right-hand sidebar?
Let’s check in with Dr. Jo to find out!
- Can you imagine having a floppy elbow like Dr. Jo mentioned?
It would seem strange! But this is why humans have ball-and-socket joints for their shoulders and hips instead of their elbows! The end of one bone sits inside the “cupped” end of another bone, thereby creating a ball-and-socket joint!
- But did you know that your body is made up of about six different freely-moving joints?
And you have only learned about two so far! A ball-and-socket joint is only one of them!
Continue on to the Got It? section to have a ball looking for more joints!