Recursos educativos cells página 20

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True / False. The heart
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Are these sentences true or false? The heart is the organ that pumps blood to all the cells in our body. The heart is about the size of a football. The walls of the heart are made of muscle tissue. The…
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Introduction - The Earth, a Living Planet
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The existence of water and a protective atmosphere were key elements for the appearance of life on Earth. The first cells appeared 3.5 billion years ago. From these early forms of life, different groups…
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Urination
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The urinary system The urinary system is the group of organs that expels waste products from our body. The blood collects these waste products from the cells. The urinary system consists of the kidneys,…
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The removal of cell waste
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4.1. What does excretion consist of? Cell activity produces waste products like carbon dioxide or urea. These substances are toxic for the organism if they accumulate. The function of excretion is…
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Complete. The bloodstream
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Complete this text with the correct words: In pulmonary circulation, blood passes from the right ventricle to the lungs through the artery. In the lungs, the blood expels carbon dioxide and collects .…
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Natural Science
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Unit 6: Living things bacteria (n): a tiny unicellular organism. cell (n): the smallest living component that makes up a living thing. feed (v): to obtain food and nourishment. grow (n): to increase in…
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A microscope
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A microscope is an instrument that magnifies very small objects, like cells, so that we can observe and study them. The main part of this instrument is a metal tube with a lens at each end: the eyepiece…
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Self-assessment T8 04 - Nutrition, breathing and circulation
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Complete this text with the correct words: The respiratory system is the group of through which we are able to inhale , and exhale . It consists of the and the lungs. The respiratory tract connects the…
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Unit 8: The Earth, a Living Planet
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Asexual reproduction (n): the process of reproduction of a single organism by itself. autotroph (n): an organism that produces its own food for nutrition. bioelement (n): any of the chemical elements…
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The senses - The senses
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We receive information on what is happening outside our body through our sensory receptors. These receptors are specialised nerve cells that capture stimuli from outside our body. There are different…
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