{"type":"video","version":"1.0","html":"<iframe src=\"https://www.loom.com/embed/febbff020ed243f9bf368734c8f631b3\" frameborder=\"0\" width=\"1440\" height=\"1080\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>","height":1080,"width":1440,"provider_name":"Loom","provider_url":"https://www.loom.com","thumbnail_height":1080,"thumbnail_width":1440,"thumbnail_url":"https://cdn.loom.com/sessions/thumbnails/febbff020ed243f9bf368734c8f631b3-7123697ef0291d12.gif","duration":2756.48,"title":"Respiratory System Overview, Gas Exchange and Ventilation","description":"This Loom provides an overview of the respiratory system, emphasizing how gas exchange works with the cardiovascular system. It explains pulmonary ventilation as breathing with inspiration and expiration, and distinguishes external respiration (air to blood in the lungs) from internal respiration (blood to tissue fluid). The speaker describes the respiratory tract layout with the upper tract above the trachea and the lower tract below it, then reviews airway structures from the nasal passages and pharynx through the larynx and trachea to the bronchi and alveoli. The lecture also covers breathing mechanics and key ventilation measurements including tidal volume (about 500 mL), inspiratory reserve volume (about 2900 mL), expiratory reserve volume (about 1400 mL), residual volume (about 1000 mL), and dead air space (about 30% of inspired air)."}