You probably have two, and five or six more. Shakespeare frequently used five. The staircase in your home has one, as do some invertebrates. My non-American friends may have difficulty with one of these clues.

Everyone has me, I'm at your very core. You have over two hundred and babies have even more! I help you stand tall and have your back. But although I cannot bend I sometimes crack.

I was, am, and shall be anxious, What am I?

Put water in front of me, and I become a relieving place. Take away my tee, and I invade your personal space. Take away my first and last, and I do not win.

I’m speeding and chasing around the track. I’m driving very fast, forward and back. A blur of chrome, a palindrome.