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Learn: Levels of Organisation - Cells to Tissues, Organs and Systems
Edexcel Combined Science GCSE
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Welcome!Today we'll explore how cells work together to form tissues, organs, and systems. This topic is essential for understanding the organisation of living things.
What are cells?Cells are the basic building blocks of all living organisms. They carry out specific functions to keep organisms alive. Different types of cells are specialised to perform certain roles, like muscle cells for movement or nerve cells for transmitting signals.
Quick check: What is the main function of cells?
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What are tissues?Tissues are groups of similar cells working together to perform a specific function. For example, muscle tissue helps with movement, while nervous tissue transmits signals across the body.
A {{blank0}} is a group of similar {{blank1}} working together.
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What are organs?Organs are structures made up of different tissues working together to carry out a particular function. For example, the heart pumps blood, and the lungs help with gas exchange.
Which organ is responsible for pumping blood?
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What are systems?Systems are groups of organs that work together to perform complex functions. For example, the circulatory system transports blood and nutrients, while the respiratory system handles breathing and gas exchange.
Match the items on the left with their correct pairs on the right
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Review Time!Great work! You've learned about cells, tissues, organs, and systems. Now let's test your understanding with a few questions.
Which of the following are examples of systems? (Select all that apply)
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Which of the following is composed of tissues?
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The {{blank0}} system is responsible for transporting blood and nutrients.
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Which is the correct order of organisation, from smallest to largest?
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