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Organ - GCSE Biology Definition

Reviewed by: Lára Marie McIvor

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An organ is a group of different tissues working together to perform a specific function in an organism. For example, the heart is an organ that pumps blood around the body, and the lungs are organs involved in gas exchange. Each organ is part of an organ system, such as the circulatory system or the respiratory system. In GCSE Biology, understanding how organs function and interact helps explain how living organisms survive and carry out essential processes.

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Lára Marie McIvor

Reviewer: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

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