lungs and breathing 0.0 / 5 ? BiologybreathingIGCSEEdexcel Created by: vanessaCreated on: 18-12-13 16:44 what does tar do it prevents cilia from brushing dirt away so the tar stays in the lungs causing bronchitis 1 of 11 what are carcinogens a group of chemicals that cause cancer 2 of 11 what is the additive in cigarettes and what does it do nicotene, where the carbon monoxide binds irreversibly to the red blood cells making them useless 3 of 11 what is the difference between breathing and respiration respiration is a chemical reaction releasing energy from food, but breathing is the movement of air in and out of lungs 4 of 11 what is a diaphragm a sheet of muscle under your thorax 5 of 11 explain the relationship between pressure and volume the bigger the volume the smaller the pressure 6 of 11 when we breathe in and out what happens to the intercostal muscle and diaphragm in: muscles contract diaphragm down out: muscles relax diaphragm up 7 of 11 what are the adaptations of the alveoli to maximise gas exchange large surface area, thin, blood vessels close together 8 of 11 why are there rings of cartilage around the trachea to support it and so it is kept in place 9 of 11 what does the cilia do collect the dust when we breathe so it doesn't go into our lungs 10 of 11 what are the adaptations of the small intestines long so increase surface area, micro villi and a good blood supply 11 of 11
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