B3, Gaseous exchange in the lungs 0.0 / 5 ? BiologyExchange of materialsGCSEAQA Created by: emmajane_Created on: 19-04-14 17:26 What are the two functions of the lungs? 1. Ventilation. 2. Gas exchange 1 of 12 What is ventilation in the lungs? The movement of air in and out of the lungs 2 of 12 What is gas exchange in the lungs? The swapping of gasses between the alveolar air and the blood 3 of 12 Where are the lungs located? In the upper part of your body called the thorax 4 of 12 What are the lungs surrounded by and what is the purpose of it? 1. Ribs and intercostal muscle. 2. Intercostal muscle plays a role in ventilating the lungs 5 of 12 What is step 1 in inhaling? 1. Intercostal muscle contracts, expanding the ribcage upwards and outwards 6 of 12 What is step 2 in inhaling? 2. Diaphragm contracts, increaing the volume of the chest 7 of 12 What is step 3 in inhaling? 3. Pressure inside the lungs is lovered and air is sucked into the lungs 8 of 12 What is step 1 of exhaling? 1. Your intercostal muscles relax And the ribcage drops inwards and downwards 9 of 12 What is step 2 of exhaling? The diaphragm relaxes, moving back upwards, decreasing the volume of the chest 10 of 12 What is step 3 of exhaling? Pressure inside the chest increases and air is forced out 11 of 12 What are the two types of ventilators? Positive pressure ventilator and negative pressure ventilator 12 of 12
Comments
No comments have yet been made