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The hierarchy of biological organisation

The hierarchy of biological organisation

Hierarchy from organelle to cell to tissue to organ to organ system with examples mitochondrion, muscle cell, muscle tissue, heart and circulatory system

Multicellular organisms are organised in levels. Small structures combine to make larger ones, and each level has a particular function.

Level of organisation Lesson

  1. IGCSE
  2. /Biology
  3. /Level of organisation

Step-by-step lessons on Edexcel IGCSE Biology Level of organisation. Each one builds up to exam-style questions. Start with the foundational cell biology and core content before moving on to the more data-heavy ecology, genetics and practical-skills topics, which carry a large share of the exam marks.

Lessons