What do you mean by column?—"A pillar."
What do you mean by erect?—"In a vertical position."
Why is cartilage placed between the bones of the spine?—"To make the spine flexible; to keep the brain from injury when we walk or run."
What do you mean by elastic?—"Springing back after having been stretched, squeezed, twisted, or bent."
Tell about your ribs.—"My ribs are curved, strong, and light."
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."