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The removal of cell waste
EduBook Organización
- 1884 visitas
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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True / False. The heart
EduBook Organización
- 1879 visitas
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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Natural Science
EduBook Organización
- 1 lo usan
- 1694 visitas
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
EduBook Organización
- 1858 visitas
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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Complete. The bloodstream
EduBook Organización
- 1847 visitas
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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Introduction - The Earth, a Living Planet
EduBook Organización
- 1827 visitas
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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Unit 8: The Earth, a Living Planet
EduBook Organización
- 1674 visitas
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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Self-assessment T8 04 - Nutrition, breathing and circulation
EduBook Organización
- 1632 visitas
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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The senses - The senses
EduBook Organización
- 1597 visitas
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…