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Lecture 15: Chapter 3-Topic '' Vacuole " -9th Class Biology (New Book PTB 2025)

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Автор: Smart Learning Hub

Загружено: 2025-09-17

Просмотров: 39

Описание: The video linked, "The Vacuole" by the channel "The Science Hub," provides a detailed lecture on the vacuole and its function in various cell types.

Key takeaways from the video include:

What is a vacuole? It is a single membrane-bound structure filled with fluid [00:23].

Where are they found? They are present in animal, plant, and freshwater organism cells [01:29].

What do they do?

In animal cells, they are small and store water and food [02:51].

In freshwater organisms, they are "contractile vacuoles" that pump out excess water and waste [04:00].

In plant cells, they are large and filled with a sap solution. The outer membrane is the tonoplast [05:49].

Turgor Pressure: When the plant vacuole is full of sap, it exerts pressure on the cell, known as turgor pressure. This provides the cell with turgidity, or rigidity, helping it maintain its shape [08:28].


The lecture is delivered in Urdu, making it accessible to students following the PTB curriculum. #sirshoaib #smartlearninghub #9biology

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Lecture 15: Chapter 3-Topic '' Vacuole " -9th Class Biology (New Book PTB 2025)

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