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13 Jan 2026

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Understanding Osmosis: Differences in Plant and Animal Cells

Naomi

@naomi_notes_them_all

Ever wondered why plants wilt when you forget to water... Show more

# Osmosis

Definitions:
Osmosis - the movement
of water molecules
across a partially
permeable membrane in
area of high water
concentration

Understanding Osmosis

Osmosis is simply water molecules moving across a membrane from where there's lots of water to where there's less water. Think of it like people moving from a crowded room to an emptier one - water naturally spreads out to balance things up.

The key player here is the partially permeable membrane - imagine a fence with holes that only let certain things through. In cells, this membrane lets water pass but blocks larger particles like sugar or salt.

High water concentration means loads of water molecules with few other particles mixed in (like pure water). Low water concentration means fewer water molecules because there are more other particles taking up space (like sugary syrup).

💡 Remember: Water always moves from high concentration to low concentration - never the other way around!

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13 Jan 2026

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1 page

Understanding Osmosis: Differences in Plant and Animal Cells

Naomi

@naomi_notes_them_all

Ever wondered why plants wilt when you forget to water them, or why drinking seawater makes you more thirsty? It's all down to osmosis - one of the most important processes happening in your body right now!

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Understanding Osmosis

💡 Remember: Water always moves from high concentration to low concentration - never the other way around!