Key points of the Respiratory System: Nose filters air to lungs. Mouth is used for inhaling and exhaling. Pharynx assists in vocalization. Larynx is the part of the respiratory system that helps us speak. Trachea is the tube that connects the throat and bronchi. Alveoli are the grape-like clusters of air sacs in the lungs. Diaphragm is the large band of muscle that controls the size of the chest cavity. Lungs are the two large lightweight organs of the body. Pleura are the outer membrane which covers the lungs. Bronchi are two branches of the windpipe. Epiglottis is like a trap door by closing when we swallow food and thus prevents food from going down the trachea. Play the interactive respiratory game! Information furnished by Rainbow Educational Media