Match the following respiratory structures with their functions. Pharynx Bronchial tree Trachea Lungs LarynxA. Paired cone-shpaed organs that contain the bronchial treeB. Branches of successively smaller tubes that conduct anir into the alveolar sacsC. Passageway for air and food that connects the nasal and oral cavities to the larynx and esophagusD. Conducts air into the right and left primary bronchiE. Routes air into the trachea and food into the esophagus and produces sound

What structure of the respiratory system provides air and food passage? A. Esophagus B. Primary bronchi C. Pharynx D. Larynx

Which body structure connects the larynx to the bronchial tree? Group of answer choicesalveolusesophaguslungstracheaglottis

The bronchial tree, lungs, and trachea are components of the respiratory tract.

The upper airway system comprises the nose and the paranasal cavities (or sinuses), the pharynx (or throat), and partly also the oral cavity, since it may be used for breathing. The lower airway system consists of the larynx, the trachea, the stem bronchi, and all the airways ramifying intensively within the lungs, such as the intrapulmonary bronchi, the bronchioles, and the alveolar ducts. For respiration, the collaboration of other organ systems is clearly essential. The diaphragm, as the main respiratory muscle, and the intercostal muscles of the chest wall play an essential role by generating, under the control of the central nervous system, the pumping action on the lung. The muscles expand and contract the internal space of the thorax, the bony framework of which is formed by the ribs and the thoracic vertebrae. The contribution of the lung and chest wall (ribs and muscles) to respiration is described below in The mechanics of breathing. The blood, as a carrier for the gases, and the circulatory system (i.e., the heart and the blood vessels) are mandatory elements of a working respiratory system (see blood; cardiovascular system).

What structure of the respiratory system conducts air into the right and left primary bronchi? A. Pharynx B. Larynx C. Nasal cavity D. Trachea