We are all familiar with
skeletons composed of bones; every Halloween, pictures of the human
skeleton adorn many houses. But there are also skeletons that aren't
made of bones.
In this Lesson, we'll explore
the different types of skeletons. Then we'll introduce the structure
and roles of bone and see how bones are assembled to form a
skeleton. We'll also look at how muscles and the skeleton work
together to cause movement.