1.4.1

Cell Specialisation

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Specialisation and Organisation of Cells

In complex multicellular organisms, cells gain specific features. This is called specialisation. Specialised cells are then organised into groups to perform a function.

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Cell specialisation

  • A cell specialises because the shape and contents of a cell help it to carry out its function. Examples include:
    • Muscle cells are very active so contain lots of mitochondria in order to produce ATP.
    • Red blood cells have a biconcave shape and no nucleus to maximise space to carry oxygen. They also have lots of haemoglobin.
    • Palisade cells have a long, upright shape and contain chlorophyll to absorb light for photosynthesis.
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Cell organisation

  • Specialised cells are organised into tissues, tissues into organs and organs into organ systems.
    • Tissues (e.g. muscle tissue, xylem tissue).
    • Organs (e.g. the animal heart or plant leaf).
    • Organ systems (e.g. the female reproductive system, which includes the uterus, ovaries, mammary glands and breasts).

Jump to other topics

1Principles of Science I

1.1Structure & Bonding

1.2Properties of Substances

1.3Cell Structure & Function

1.4Cell Specialisation

1.5Tissue Structure & Function

1.6Working with Waves

1.7Waves in Communication

2Practical Scientific Procedures and Techniques

3Science Investigation Skills

4Principles of Science II

4.1Extracting Elements

4.2Relating Properties to use of Substances

4.3Organic Chemistry

4.4Energy Changes in Industry

4.5The Circulatory System

4.6Ventilation & Gas Exchange

4.7Urinary System

4.8Cell Transport

4.9Thermal Physics

4.10Materials

4.11Fluids

5Contemporary Issues in Science

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