Flexi Says: Humans and other animals can make sounds. But only humans can convert sound to speech with his brain and body coordination. To speak, many organs like stomach muscles, lungs, larynx, voice box, tongue, teeth, lips, and even the nose work together. Speech actually starts in the stomach with the diaphragm. This is a large muscle that helps push air from the lungs into the larynx, or voice box that contains vocal cords, which allow us to produce vocal sounds. Air passes through thin tissues in the larynx, producing sound. Then, the lips, tongue, and teeth form the sounds to make speech.
