Where is the spine?—"It extends from the base of my skull behind, down the middle of my back."
What do you mean by extends?—"Goes from."
What do you mean by base?—"The lower part of anything."
Of what is the spine made?—"Of about twenty-four short bones, with cartilage between them."
What is cartilage?—"An elastic substance, harder than flesh, but softer than bone."
How are the bones of the spine placed?—"They are piled one upon the other."
What do you mean by forming?—"Making."
What do you mean by upright?—"In a vertical position."
What do you mean by flexible?—"Easily bent."