Vacuoles 9 class Biology in Urdu \ in Hindi | cell organelles| Lec #15 | chp #4 | cells and tissues
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LearningTranscript
00:00Assalam-o-Alaikum, today we will talk about vacuole.
00:07First of all, let's see its introduction.
00:11Vacuoles are fluid-filled, single-membrane-bonded organelles.
00:18What is a vacuole? It is an organelle.
00:21Single-membrane means it has only one membrane.
00:27Fluid-filled means it is filled with fluid.
00:33So, what is a vacuole? It is a single-membrane-bonded organelle filled with fluid.
00:41Location, where are they present?
00:45It is present in animals, plants, and some unicellular organisms.
00:51It is present in animals, plants, and some unicellular organisms.
01:00Location, where are they present?
01:05It is present in cytoplasm.
01:09In mature plants, it is present at the center.
01:18For example, a plant has a central large vacuole at its center.
01:25Why is it called a central large vacuole?
01:29Central means it is present at the center of the cell.
01:35So, a large vacuole is present at the center of the cell.
01:42In animals, it is present at the center.
01:48Small vacuoles are present around the nucleus.
01:55In non-mature plants, it is present at the center.
02:02Small vacuoles are present around the nucleus.
02:07When plants mature, these small vacuoles fuse with each other to form a large vacuole.
02:24What is the function of a vacuole?
02:27It stores water and minerals.
02:34It provides turgidity to the plant.
02:40It absorbs water and that is why it blooms.
02:46When it absorbs more water, the plant becomes hard.
02:54Turgidity makes the plant hard.
02:58What is the second function?
03:02At the start of this lecture, we learned that a vacuole is present in plants, animals, and some unicellular organisms.
03:12What is the function of a unicellular organism?
03:16Some unicellular organisms like amoeba have food vacuoles present in them.
03:26Food enters the cell through phagocytosis.
03:32Lysosomes are present in the cell.
03:36What is the function of a lysosome?
03:40Lysosomes are present in the cell.
03:43Lysosomes are present in the cell.
03:49The food that comes from outside is fused with the lysosomes.
03:55The lysosomes break down the food through their enzymes.
04:02The waste material is stored in the cell in the form of a contractile vacuole.
04:16Through this contractile vacuole, the waste material is taken out of the cell.
04:23Unicellular organisms have two types of vacuoles.
04:30One is a food vacuole and the other is a contractile vacuole.