What structures does the air travel?
The diaphragm is the muscles involved in inspiration- inhaling. The abdominal muscles are involved in expiration or exhaling. Breathing: During the process of breathing, air moves through the structures of the respiratory system in the following order: Air is taken in through the mouth and nasal passages. Air passes through the pharynx. Air moves into the larynx, or voice box, where it passes through the glottis, an opening in the vocal cords. Air travels through the windpipe, or trachea. This structure is supported by rings of cartilage, which prevent collapse. The trachea forks into two smaller tubes called bronchi, each of which leads to one of the two lungs. The bronchi branch into increasingly smaller tubes called bronchioles within the lungs. The bronchioles deliver the air into the alveoli. of the lungs. Alveoli Gas exchange takes place over the surface of the alveoli. The alveoli are covered in dense capillary beds in which blood is constantly circulated. Oxygen diffuses from t
