Lysosomes class 9 Biology in Urdu / in Hindi | cell organelles| Lec #13 | chp#4 | cell and tissue | - video Dailymotion

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00:00Assalam-o-Alaikum, today we will talk about Lysosome. Lysosome means breakdown,

00:11down. And Soma means body, which breaks down things. So first of all let's look at its

00:27introduction. In the mid-20th century, a Bulgarian scientist named Christian Reni-Didiot,

00:37discovered Lysosome. Lysosome is a single-membrane-bonded organelle. Lysosome is an organelle and its

00:49structure is pink. Christian Reni-Didiot discovered Lysosome. In the previous lecture,

01:11we had studied about rough endoplasmic reticulum and ribosome. What do these two make? Protein.

01:22Smooth endoplasmic reticulum makes lipid. So, after making protein and lipid in endoplasmic

01:32reticulum and ribosome, it comes in Golgi apparatus, in the form of vesicles, as you can see in this

01:42diagram. So, Golgi apparatus stores these vesicles. And whenever cell needs these things, Golgi

01:52apparatus slightly modifies them and covers their grid membrane. After this, wherever

02:04protein and lipids are needed in the cell, they are delivered there. And if needed outside

02:12the cell, these vesicles are delivered outside the cell. This was the work of Golgi apparatus.

02:18So, the protein and lipid, rough endoplasmic reticulum, ribosome and smooth endoplasmic

02:29reticulum come in Golgi apparatus. They make an enzyme by mixing protein and lipid. Golgi

02:41apparatus makes an enzyme by mixing these two and covers its grid membrane. This is called

02:51lysosome. As you can see, Golgi apparatus has made lysosome by mixing protein and lipid.

03:01And this lysosome is called primary lysosome. And what is the function of lysosome? It digests

03:12food. So, when it is fused with food, it is called secondary lysosome. So, how is lysosome

03:24made? Protein and lipids come from endoplasmic reticulum and ribosome. Golgi apparatus converts

03:36protein and lipids and covers its grid membrane. This is called lysosome. What is the function

03:44of lysosome? Lysosome is an enzyme which breaks down. Its function is digestion. It digests

03:55food. As you can see in the diagram, this is a food particle. It enters the cell. There

04:02are many lysosomes in the cell. So, it is fused with the food particle. As you can see

04:09in the diagram, upper part is lysosome and lower part is food particle. It is fused with

04:16lysosome. After this, it breaks down these particles through its enzyme. And it converts

04:23large molecules into simple molecules. It converts into simple molecules and absorbs

04:33the molecules which are needed in the cell. It takes out the waste material from the cell.

04:40So, what was its first function? It was food digestion. Its second function is that if

04:48any bacteria enters the cell, it fuses with the bacteria. After this, it breaks down the

04:55bacteria. After this, it takes out the waste material from the cell. So, what was its first

05:02function? It was food digestion. Its second function is that if any bacteria enters the

05:09cell, it fuses with the bacteria. After this, it breaks down the bacteria. After this, it

05:16takes out the waste material from the cell. So, what was its second function? Its first

05:23function is that if any bacteria enters the cell, it fuses with the bacteria. After this,

05:30it breaks down the bacteria. After this, it takes out the waste material from the cell.

05:37After this, it breaks down the bacteria.

Lysosomes class 9 Biology in Urdu / in Hindi | cell organelles| Lec #13 | chp#4 | cell and tissue |

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