Question

The Conducting and Respiratory Divisions The conducting division is involved in exchange of air entilation but not in respiration. It is the passageway air takes from your nose or mouth to where as exchange takes place in the lunes. Nos exchange takes place in the conducting division, because the layers of the passway are too thick for the pases to diffuse through. It includes the nose, the pharynx, the larynx, the trachea, and the bronchi. List, in order, the pathway oxygen would take from your nostrils to your tertiary bronchi Tertiary bronchi branch into small bronchioles that lack cartilage. Bronchioles branch into terminal bronchioles, which mark the end of the conducting division. In the conducting division, the passageway is characterized by the presence of cartilage rings (in the upper sections) and is lined with mucous membranes containing ciliated epithelial cells. The cartilage prevents the collapse of the airway. The mucous membranes produce mucus to trap foreign material and prevent it from getting deep into the lungs. The cilia beat, moving the dirty mucus upward so it can be expelled from the body or swallowed. This is called the mucociliary escalator (not pictured). The respiratory division is involved in the exchange of respiratory gases (O, and Co.) between the air spaces in the lungs and the blood. It includes the respiratory bronchioles, small divisions off the terminal bronchioles, that end in alveolar sacs made up of continuous alveoli (sing. alveolus). The respiratory zone lies in close association with the blood supply coming from the heart. Remember that the pulmonary arteries are bringing deoxygenated blood from the heart to the lungs for oxygenation. The blood is oxygenated in the respiratory zone, and excess carbon dioxide is removed. The blood is then returned via pulmonary veins to the heart. Label Figure 7-4 with the provided terms. TERMS FOR FIGURE 7-4 Alveolar duct Alveolar sac Alveoli Bronchiole Lymphatic vessel Pulmonary arteriole Pulmonary capillary beds Pulmonary venule Respiratory bronchiole Terminal bronchiole RCURE 7-4 The respiratory division

Answer 1

The Conducting and Respiratory Divisions The conducting division is involved in exchange of air entilation but not in respiration. It is the passageway air takes from your nose or mouth to where as exchange takes place in the lunes. Nos exchange takes place in the conducting division, because the layers of the passway are too thick for the pases to diffuse through. It includes the nose, the pharynx, the larynx, the trachea, and the bronchi. List, in order, the pathway oxygen would take from your nostrils to your tertiary conch... hange takes place in the lungno in respiration. It is the passageway air takes Nostril - Nasal cavity -- Nasopharynx - Oropharynx Laryngopharnx----- Larynx ------- Trachea ------ Primary bronchi ... Secondary bronchi---- Tertiary bronchi Tertiary bronchi branch into small bronchioles that lack cartilage. Bronchioles branch into terminal bronchioles, which mark the end of the conducting division. In the conducting division, the passageway is characterized by the presence of cartilage rings (in the upper sections) and is lined with mucous membranes containing ciliated epithelial cells. The cartilage prevents the collapse of the airway. The mucous membranes produce mucus to trap foreign material and prevent it from getting deep into the lungs. The cilia beat, moving the dirty mucus upward so it can be expelled from the body or swallowed. This is called the mucociliary escalator (not pictured). The respiratory division is involved in the exchange of respiratory gases (O, and Co.) between the air spaces in the lungs and the blood. It includes the respiratory bronchioles, small divisions off the terminal bronchioles, that end in alveolar sacs made up of continuous alveoli (sing. alveolus). The respiratory zone lies in close association with the blood supply coming from the heart. Remember that the pulmonary arteries are bringing deoxygenated blood from the heart to the lungs for oxygenation. The blood is oxygenated in the respiratory zone, and excess carbon dioxide is removed. The blood is then returned via pulmonary veins to the heart. Label Figure 7-4 with the provided terms. Bronchiole terminal bronchiole TERMS FOR FIGURE 7-4 Alveolar duct Alveolar sac Alveoli Bronchiole Lymphatic vessel Pulmonary arteriole Pulmonary arteriole Pulmonary capillary beds Pulmonary venule Pulmonary venule Respiratory bronchiole Terminal bronchiole pulmonary capillary beds Pulmonary arteriole Respiratory bronchiole Alveolar duct Alveoli Alveolar sac RCURE 7-4 The respiratory division