Where are your ribs?--"On each side of my trunk."

How many ribs have you?--"Twenty-four; twelve on each side."

How are your ribs fastened?--"At the back to my spine; in front to my
breastbone."

What do your ribs form?--"A hollow place for my heart, lungs, and stomach."

Where are your shoulder blades?--"In the upper part of my back."

What shape are they?--"Flat, thin, and like a triangle."

Of what use are your shoulder blades?--"For my arms to rest upon."

Point to your collar bones.

Where are they fastened?--"To my shoulder blades and my breastbone."

Of what use are your collar bones?--"They keep my arms from sliding too far
forward."

Of what are your bones made?--"Of food after it has been changed into
blood."

Why should you eat wholesome food?--"That my bones may be strong and
healthy."

How does impure air hurt the bones?--"Impure air makes bad blood, and bad
blood makes poor bones."