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Respiration
EduBook Organización
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3.1. How do cells obtain energy? In aerobic cellular respiration, nutrients break down in the presence of oxygen and gradually release their energy. This process generates carbon dioxide (figure 1). The…
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Self-assessment T8 10 - Nutrition, breathing and circulation
EduBook Organización
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Are these sentences true or false? The urinary system consists of the kidneys and the ureters. The circulatory system transports nutrients to all the cells in our body. The kidneys extract water and…
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Natural Science
EduBook Organización
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Unit 8: Nutrition, breathing and circulation allergy (n): a negative reaction in our body's immune system to a certain substance, like nuts or shellfish. breathing (n): the act of inhaling oxygen…
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Learn. Measure your heart and breathing rates
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What do we do? Our circulatory and respiratory systems are constantly adapting to our body's needs. You can test this with the following experiment. While you are resting, check your pulse and count…
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Structure of a tapeworm
EduBook Organización
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Adult tapeworms are intestinal parasites of vertebrates. They have a very simple structure. Tapeworms do not have a respiratory, circulatory or digestive system. Their body is ribbon-shaped, with a head…
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