You will find the drawing in the Drawfiles section of the Media Index labelled "Skeleton".
1) Print out the drawing and label the joints in the body. Use these types of joints:- fixed, sliding, pivot, hinge, ball and socket.
2) Think about other kinds of joints you come across everyday and compare them with the joints in the body. Can you match the joints in the body with any examples such as door hinges = elbow etc?