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Organisation (The heart: pumps blood around the body in double circulatory…
Organisation
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Plant tissues
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lower epidermis: full of little holes called stomata , the opening and closing of stomata is controlled by guard cells
Health issues
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defects in the immune system mean that an individual is more likely to suffer from infectious diseases
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immune reactions initially caused by a pathogen can trigger allergies such as skin rashes and asthma
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Lungs
Trachea
Bronchi
Bronchiole
Alveoli: large surface area to volume ration, one cell thick and surrounded by a network of capillaries
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