GCSE Combined Science (AQA)

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Cells, Tissues & Organs

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Organisation Principles of Organisation

Cells, Tissues & Organs

1:18 Cells, Tissues and Organs
Spec 4.2.1
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  • Cells are the basic building blocks of all living organisms.
  • A muscle cell is an example of a cell.
  • Tissues are groups of similar cells that function together.
  • Cardiac muscle is an example of a tissue made from cardiac muscle cells.
  • Organs are groups of tissues working together to perform specific functions.
  • The heart is an organ composed of different tissues that pump blood.
  • Organ systems are groups of organs that work together to form whole organisms.
  • The circulatory system, consisting of the heart and blood vessels, distributes blood and nutrients throughout the body.
  • Understanding the definitions and hierarchical organization of cells, tissues, organs, and systems is crucial for exams in subjects like biology.

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