STEVE TAYLOR / SCIENCE PHOTO LIBRARY STEVE TAYLOR / SCIENCE PHOTO LIBRARY
Head anatomy. Side-view of an anatomical model of the human head and throat. Part of the skull has been cut away to show the brain. The structures of the throat are also shown. These include the carotid artery (red), which carries blood from the heart to the brain, the larynx (blue), or voice box, and the thyroid gland (yellow, lower centre). The larynx, which is situated at the top of the trachea (wind pipe), consists of bands of cartilage. It generates the voice and prevents food from entering the trachea during swallowing. The thyroid gland secretes the hormone thyroxine, which controls the rate of metabolism.
Model release not required. Property release not required.