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An organ is made up of tissues, and tissues are made up of specialized cells. Each leaf has many tissues, made of cells like mesophyll cells and others. Therefore, because a leaf is made of tissues, it itself is not a tissue, it's an organ. Organs are also described as performing specific tasks for an organism and, leaves carry out photosynthesis for plants.

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15y ago
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13y ago

It is a complete functional system for photosynthesis, Kerbs cycle, transpiration & diffusion of gases like any organ.

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Q: Why is a leaf described as an organ not a tissue?
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