How many joints has your leg?--"Three joints: my hip joint, my knee joint,
my ankle joint."

What are joints?--"Bending places."

How many kinds of joints have you?--"Two: hinge joints, and ball-and-socket
joints."

What kind of a joint is the shoulder joint?--"A ball-and-socket joint."

Why do you call the shoulder joint a ball-and-socket joint?--"Because at
the shoulder the arm may move in any direction."

Tell how the shoulder joint is made.--"The upper end of the bone of the
upper arm is rounded and fastened in a hollow place called a socket."

Which of the joints of the arm and hand are hinge joints?--"The elbow
joint, the wrist joint, the thumb joint, the finger joints."

Which of the joints of the leg and foot are hinge joints?--"The knee joint,
the ankle joint, the toe joint."

Which of the joints of the leg is a ball-and-socket joint?--"The hip
joint."

Where is the heel?--"At the back part of the foot."

Where is the ball of the foot?--"On the sole of the foot, behind the great
toe."