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Inhaling and exhaling
EduBook Organización
- 2340 visitas
Air is renewed in the pulmonary alveoli of the lungs when we inhale and exhale. When we inhale, our lungs expand and when we exhale, our lungs contract. We use a large muscle called the diaphragm and…
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Investigate. Respiratory system
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Our respiratory system can be affected by allergies if the air we breathe contains certain substances, like pollen. Asthma and rhinitis are two common types of allergies. What is an allergy? What are…
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Using our muscles
EduBook Organización
- 2343 visitas
Atrophy occurs when we do not use our muscles very much for a long period of time. Our muscles atrophy if we break an arm or leg because the cast stops us from producing movement and we cannot use those…
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True / False. How do muscles move?
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- 2347 visitas
Are these sentences true or false? We only use our muscles to produce movement. When we produce movement or force, our muscles become shorter and thicker because they contract. When the muscle…
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Look and answer. Brain and spinal cord
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This diagram of the brain and spinal cord also shows the bones that protect them: Which bones protect the brain? Which bones protect the spinal cord? Why is it important to protect the central nervous…
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Summaries - Machines and structures
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1. Electrical current An object becomes electrically charged when it contains an electrical charge. Some objects become electrically charged when we rub one against the other. For example, when you rub…
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Think and answer. Science and technology
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Think and answer: Describe what you can see in the photos. Give examples of scientific progress in the 20th century. Do you use the Internet? What do you use it for? What is an e-mail? How do you send…
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Verdadeiro/falso. Características principais do Neolítico
EduBook Organización
- 2349 visitas
Sinala se son verdadeiras ou falsas as seguintes frases: O Neolítico iniciouse cara ao VIII milenio a.C. no Sur de Europa. Os avances que levaron ao Neolítico foron o cultivo da terra e a…
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Verdadeiro/falso. Agricultura, minaría e comercio en época romana
EduBook Organización
- 2337 visitas
Sinala cales das seguintes afirmacións son verdadeiras e cales son falsas: Os romanos melloraron as técnicas agrícolas de iberos e celtas. Os romanos introduciron un novo sistema de arado e técnicas…
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Avaliación inicial T12 02 - A reprodución humana
EduBook Organización
- 2335 visitas
Escolle para cada función a parte do aparello reprodutor que a realiza: Forma os óvulos. Alimenta o feto. Leva os espermatozoides ata o exterior do corpo. Forma os espermatozoides.
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