Fill in the Blanks HEARING SENSEOnline version Complete the following text about the hearing "how do we hear things". by Claudia Pérez 1 inner eardrum outer brain ears hearing Your ears are the organs of . They have three parts : the outer ear , the middle ear and the ear . The ears are delicate , so they make a substance called earwax that protects the from dirt and infection . ¿ How do we hear things ? 1 . Sound waves enter through the ear . 2 . The waves hit the in the middle ear and make it vibrate . 3 . This vibration makes the liquid in the inner ear move and send signals to the . 4 . The brain reads the signals and tells you what are you hearing .