Breathing ~ The Human Lungs {INSPIRATION - breathing in} 0.0 / 5 ? BiologyHuman, animal and plant physiologyASAQA Created by: emilyowlCreated on: 14-04-16 09:46 What is inspiration? Inspiration is the active process of breathing in. 1 of 8 What do the external intercostal muscles and the internal intercostal muscles do during inspiration? The external intercostal muscles contract and the internal intercostal muscles relax. 2 of 8 What movement happens to the ribs during inspiration? The ribs are pulled upwards and outwards. 3 of 8 What happens to the volume of the thorax during inspiration? The volume of the thorax is increased. 4 of 8 What happens to the diaphragm during inspiration? The diaphragm contracts and flattens. 5 of 8 What happens as a result of the volume of the thorax during inspiration? The increased volume of the thorax results in reduced pressure in the lungs. 6 of 8 Compare the pressure in the atmosphere and in the lungs during inspiration. Atmospheric air has greater pressure than pulmonary pressure in the lungs. 7 of 8 What happens as a result of the different pressures in inspiration? Air is drawn in from the atmosphere through the trachea into the lungs from high to low pressure down the pressure gradient. 8 of 8
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