We just learned about the Electroencephalography and a lot of other things about sleep.
We've learned before about all of the bones in the human body, like the femur.
All of the bones have different parts, so let's learn about those!
One part of the femur is the Femoral Head.
This is the ball at the top of the femur that fits into the hip socket and helps the leg move around in the right way.
(from: wikipedia - femoral head)
Kid Facts - Blast from the past: Eustachian Tube
