elastic cartilage: Cartilage that contains elastic fibers in the matrix, so it’s more flexible than either hyaline or fibrocartilage; your ear has elastic cartilage.

endoneurium: The delicate layer that surrounds each individual nerve fiber in the peripheral nervous system.

epidermis: The tough layer outermost layer of skin. It gets its toughness from a protein called keratin.

epineurium: The thick layer of connective tissue that surrounds a bundle of fascicles in the peripheral nervous system.

esophagus: A muscular tube that extends from the pharynx to the stomach.

eversion: To move the bottom of your foot away from the midline of the body.