PCB 3703C Lecture Notes - Lecture 10: Nociceptor, Alpha Beta, Viscosity

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Inside the thoracic cavity, upper part is the apex, narrower and the bottom is called the base. The lung is covered by a membrane called pleura which is a blueish color. This is due to embryonic cell division which gives rise to lung tissue. Recall from cardiovascular. : pulmonary artery carries deoxygenated blood. Nasal cavity trachea thoracic cavity bifurcates as primary bronchi secondary bronchi tertiary bronchi alveoli. Diffusion of gases such as o2 and co2 dry inspired air: Trachea: p o2 100 mmhg / p co2 0 mmhg. Bronchi: p o2 150 mmhg / p co2 0mmhg. The humidity of bronchioles decreases the pressure of o2. Alveolus o2 100 mmhg / p co2 40mmhg. Capillaries p o2 40mmhg / p co2 46mmhg: carbaminohemoglobin, in which co2 is bound to the globin protein. *gas diffusion depends on three factors: partial pressure of that gas, diffusion occurs as simple diffusion.

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