Notes by yingzhou edward pan: structure of the lungs and chest wall. Fundamentally, the respiratory system is concerned with gas exchange. The collecting of oxygen into the blood stream for delivery. The evacuation of carbon dioxide out of the blood into the atmosphere. The respiratory system is closely linked to the cardiovascular system. Which is responsible for the collection and transportation of gases. The respiratory system begins from the outside with the nostrils. Chamber where air flows through system of turbulance. First round of filtering away of dust, warming and moistering of air. Larynx: first section of tract dedicated to respiration. Trachea: cartilaginous tube structure that splits into 2 bronchi. Bronchi: similar to trachea, but within the lobes of the lungs. Alveoli: very delicate structures, site of gas exchange. Lobes: separations of a single lung on one particular side of the body. In humans, 2 lobes on left, 3 lobes on right.