thorax: The section of the body that starts immediately below the neck, at the clavicles, and ends along the bottom of the ribcage. It’s visible from the front.

transverse planes: Imaginary horizontal planes that pass through the body at right angles to the midsagittal and the frontal planes. They divide the body into upper and lower portions. You need to have a reference point to know exactly where a transverse plane lies.

tubercle: Bony projection.

tympanic membrane: The eardrum.