1. CELLS โ Individual specialized units (from Topic 1)
Examples: Muscle cell, nerve cell, palisade cell, root hair cell
Examples: Muscle cell, nerve cell, palisade cell, root hair cell
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2. TISSUES โ Groups of similar cells working together
Examples: Muscle tissue, nervous tissue, xylem tissue, phloem tissue
Examples: Muscle tissue, nervous tissue, xylem tissue, phloem tissue
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3. ORGANS โ Groups of different tissues working together
Examples: Heart, brain, leaf, root
Examples: Heart, brain, leaf, root
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4. ORGAN SYSTEMS โ Groups of organs working together
Examples: Circulatory system, nervous system, transport system in plants
Examples: Circulatory system, nervous system, transport system in plants
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5. ORGANISM โ All systems working together for life
Examples: Human, oak tree, dog, rose plant
Examples: Human, oak tree, dog, rose plant
This key facts covers The Organizational Hierarchy of Life within Tissues, Organs and Organ Systems for GCSE Biology. Organizational hierarchy from cells to organ systems, tissue types in plants and animals, structure-function relationships, and system interactions It is section 7 of 15 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Tissues, Organs and Organ Systems
What is the correct order of biological organisation from simplest to most complex?
Describe the functions of glandular tissue and epithelial tissue in animals.
Quick recall flashcards
What is a tissue?
A group of similar cells that work together to perform a specific function.
What is an organ?
A group of different tissues working together to perform a specific function.