CO2 is transported in the blood by 3 main routesīlood flow to and around the lung is similar to any other organ but at much lower pressures than the systemic system (see diagram).More oxygen is carried dissolved in blood than CO2.CO2 is carried best by oxygenated haemoglobin.oxygen CO2 is mainly tranported as carbamino compounds.there is about 15ml of oxygen per 100ml of oxygenated blood.is directly proportional to the thickness.is indirectly proportional to the concentration gradient.is increased with a decrease in surface area.dead space is usually about 45% of tidal volume.anatomical dead space is measured by the Bohr equation.physiological dead space is the same as alveolar dead space.is defined as the volume of gas which does take part in gas exchange.the lungs are lined with transistional epithelium.bifurication of the bronchi occurs at T4.

generations 1- 18 are known as the conducting zone of the lungs.The oxyhaemoglobin dissociation curve is shifted to the left by:.The answers can be found at the end of the article, together with an explanation. Before continuing, try to answer the following questions.

Dead spacing in the lungs