Cell Structure and Functions Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 8
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✅ In this video,
✔️ Class: 8th
✔️ Subject: Science
✔️ Chapter: Cell Structure and Functions
✔️ Topic Name: Cell Structure and Functions Full Chapter Class 8 Science | NCERT Science Class 8 Chapter 8
✔️ Topics Covered in This Video: Full Chapter Explanation & Exercise from Class 8 Science Chapter 8 Cell Structure and Functions
=======================================================
00:00 Science Introduction: Cell Structure and Functions
00:05 Discovery of the Cell
1:50 The Cell
4:41Number of Cells
7:29 Shape of Cells
11:14 Size of Cells
13:21 Cell Structure and Function
15:47 Activity
20:32 Part of the Cell
27:26 Comparison of the Plants and Animals Cells
28:54 Solutions
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Ok
What is cell
Thank you
Basic structural and functional unit of all the organs present in the living organisms is called cell.
I want the notes of this chapter
who's watching in 2024??
This video is 3 year ago and I am seen in 2024
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@@Pari_20575 he is right actually
A nerve cell has to transmit nerve impulses to organs located in different parts of the body so that's why it is long
Good
Me who is in 12th now : how easy 8th was
Me in 8th : I can't understand anything
I also çlass 8 and i understood this 😊
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Sad but true
8:30 Nerve cells are long because they need more area other than any cell to pass the signal
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Or
Thank you my dear friend 😊😀
Nice answer
In 1665 Robert Hooke observed a thin slice of cork ( dead cell)under this primitive microscope.
In 1670 A.V. Leeuweehoek observed and describe cell in drop of pond water ( living cell )using compound microscope.
Robert Brown discover Nucleus ( control center of the cell ).
In 1839 cell theory was given by Scheilden and Schwann
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This video is 3 years ago and i am studying it in 2024
8:35 nerve cell recieve and transmit messages ,orders to the main engine (brain) of the body
8:35 Nerve cells: they are long because they need to pass the messages to the brain from a long distance.
Rbc's: they have a depression to store oxygen
Muscle cells: cylyndrcal and branched as they keep in the movement if contracting and relaxing
also: 9:06 wbc 's can also change their shape to help in destroying germs in our body
Thanks for more information
Hello mam ..I am preparing for NMMS exam class 8th and yur explaination is very good thanks a lot..
😊🙏🏻 My exam date is 30 Jan 2022..pls pray for me..🥺🙏🏻
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all the best
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You told cork cell , discovered by Robert Hooke . But you didn't tell what is cork
. And where he first observe these cells.
So , Cork is a bark of trees , and they are all dead cells of a tree. And he observed it on tree dead cells. 😑
(Largest unicellular) Egg of ostrich = 170 mm × 130 mm ( approx )
1micron = 10-³ mm
8:30 Q.1 Why nerve cell are long?
Because each cell is made by its function nerve cell work is to send message from brain to all parts of body 😜
Tyy ✨😶🌫️
Nerve cells are long and have branches because they need more surface area to pass the signals to cell by cell
Harshita Chamyal, Thanks for being active on the channel. Do recommend us to your friends.
Nerve cells are long and have branches because they need more surface area to pass the signals to cell by cell. Their branches structure helps them to receive and transfer messages, thereby helping to control and coordinate the working of different parts of the body.
M S Dhoni FANCLUB, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
Can you answer my question
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29:49 but nerve cells are branched and muscle cells are spindle shaped
You are absolutely right! I was also thinking that the statement should be False instead of "True"
Nerve cell is longest because it carry messages between different parts of the body to the brain or spinal cord
Helllo 😇😇
My age 13
Thanks mam after see this video I understand this chapter easily
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15:47 Magnet brains, I just want to ask one thing that in the activity you are using the solution methylene blue but in my book they are using safranin solution. So can we use both solution? Please tell me. And I want to add one thing that thread like structures are called chromatin threads not chromosome.
Chromatin is a complex of DNA, RNA, and proteins found in the nucleus of eukaryotic cells. It is the substance from which chromosomes are formed. Whereas, Chromosomes are thread-like structures composed of DNA and proteins that carry genetic information.
I'm pretty sure you can use any type of dye.
Ofc not food dye
Nerve cells are long because their function is to convey message from all parts of the body
Thanks a lot magnet brains for this great explanation....it helped me a lot
Thank you magnet brain for teaching us in lockdown keep raising
If u agree plz reply
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@@MagnetBrainsEducation i understand everything
Outstanding teaching mam I love your teaching style which make our concept easier
Thank you mam 🙂🙂
8:35 nerve cell is long as it receives and transmits messages from brain to different part of the body btw ur teaching skills are amazing 👍😊
Correct
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Who watch it in 2024❤😂🎉
Q. Why are nerve cells long?
Ans:-Nerve cells are long because they require greater surface area to transfer signals one cell to another.
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The nerve cell receives and transfer messages, thereby helping to control and coordinate the working of different parts of the body.
Thank you for your comment! We appreciate your input!
because nerve cells carry messages to the brain and to the other part of bodies .basically the job of this cell is to recieve ,carrying and taking messages from 1 part two another
The parts of plant cells are - cell wall ,cell membrane, cytoplasm, plastid ,vacuole, nucleus.
Animal cell consists of cell membrane , cytoplasm, nucleus and vacuole.
Parts of A nucleus are nuclear membrane, nucleoplasm, nucleolus, chromatin material and nuclear pore👍
One more part of nucleus is chromosomes
Great knowledge
The extension of nerve cell helps in passage of chemical and electrical message throughout the body
14:14 extraction system ke organ kidney hote hai
Small intestine: 👁️👄👁️
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Kidney is a part of execretry system.
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Nerve cells are usually very long and branched so that it helps in transmission of signals or electrical impulses over all parts of the body
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Thank you so much ma'am!! I have improved a lot in science because of u😊
You are maha looser
Thanks mam. As I have doubts that are cleared with this video. But u didn't explain about cell division.
Nerve cells carry messages between different parts of the body. Hence, they are elongated in shape
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Ma'am and Magnet Brain,please correct in 29:49 that muscle cells are not branched but nerve cells are.Muscle cells are spindle shaped.
👏👏 clapping for those who have exam tomorrow and studying today
Jod bro😂
Yes
Nerve cells are long as they transmit information from brain to the various body parts.
Ananya Vadher, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
Hey
Thank you so much magnet brains!
Day after tomorrow is my exam of science and this video helped me Soo much! Two of my friends recommended this video to me and this is really really helpful!
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This chapter was very helpful ❤️
Nerve cell is very long beacuse it receives and transfer messages thereby helping to control and coordinate the working of different parts of the body.
They are thin, and can be more than 1 metre long. This means they can carry messages up and down the body over large distances. Nerve cells have branched connections at each end. These join to other nerve cells, allowing them to pass messages around the body.
Thank you for your insightful comment! It is truly amazing how nerve cells can be so long and still pass messages so quickly throughout the body. We hope our videos can help students learn more about the wonders of biology.
Because nerve cell receives and transfers messages, thereby helping to control and coordinate the working of different parts of the body
Thank you for taking the time to watch our educational video and for understanding the content! We're glad that you found the video helpful in understanding how nerve cells work to control and coordinate the working of the body. We hope that you'll continue to explore our educational videos and learn more!
Nerve cells are long because it helps it to send messages throughout long distances in the body.
Anyone here after 7th class exams because their exams didn't go that good or because they want to do well next year.
extremely informative video
helped me a lot to study for my exams
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MAM AS YOU SAID THAT LIVING ORGANISMS HAVE CELL BUT ONION IS NON LIVING PLEASE EXPLAIN.
8:30 ( A Nerve cell is very long because it carry messages and send them to all the parts of the body)❤️❤️
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Thank you so much magnet brains !
Thanks for preparing me for science exams 😊
ADM 8368 RCCA 8D, Thanks for the reply. Wherever possible, please recommend us to your friends.
@@MagnetBrainsEducation yes sure we will recommend our friends so that they can also know further about this concept
Why nerve cell is long?
Ans) Nerve cell is long because their main task is to transmit impulses (message) over long distance.
The length of the nerve cell also allows for a greater surface area for the exchange of materials between the cell and its environment.
Nerves cells elongated as they needed to carry message to the different parts of the body are known as nerve cells
My all doubts are cleared, after watching this video
Your explanation is too good to understand
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0
@@MagnetBrainsEducation Ma'
am what is necleus pore and neceoplasm
Next level teaching Mam🙏❤️
Lot's of thank u❤️❤️
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@@MagnetBrainsEducation thx mam
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The definition of cell is The basic structural and functional unit of all living organisms is called cell 😊
There is also cytoplasm lying between plasma membrane and nucleus😊😊 , by the way thank you mam😊
So nice and clear explanation
Thank you ma"am 💖💖💖
U like a good surprise to my studies
Thank you for this wonderful explanation. I felt this chapter to be very hard, but I can understand this now very easily
Nerve cells have to transmit nerve impulses in different part of the the body and that is the reason for their long fibre like structure.
Nerve cells are long because they have to transmit nerve impulses to organs located in different parts of the body.
8:30 - The major function of nerve cells is to transfer messages in the form of electrical impulses to different parts of the body. Nerve cells are long and have branches because they need more surface area to pass the signals to cell by cell.
Is this the right answer?
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Legends are watching one day before exam😂😂
Yesh
8:28 Nerve cells are long and have branches because they need more and more surface area to pass the signals to cell by cell.
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@@MagnetBrainsEducation Sure I recommend videos to my friends
Nerve cells are long and have branched projections which helps in receiving and transferring messages thereby helping to control and coordinate the working of different parts of body.
Mam you are doing a great job keep it up your explanation was excellent
Nerve cells are usually very long and branched so that it helps in transmission of signals or electrical impulses over all parts of the body.
Great job! You are absolutely right! Nerve cells are long and branched to help transmit signals throughout the body.
Mdmdm
Q
You have explained this chapter nicely mam, and after listening to this I have to say that you explain simply so that we could understand easily....thank you mam...hope could watch more videos of you ...
Thankyou for clearing my doubts...now I can give my test without any confusion 😌😊
Ananya Chargotra, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
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Mam I am srishti from class 8...Mam mujhe Jo nahi samajh aa raha tha vo is video me bahut hi clearly bataya Gaya and ab mai is channel ko hi recommended karti hu....thanks a lot mam this is for you😋😋
Wow I am in 8 th standard be the frd don't be scare I will respectively talking to you . Hi I am Rahul don't be panic
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I can't understand anything in this chapter before watching this video after I watched this video. I had understood everything thing and I love magnet brains because of their style of teaching.🙂🙂
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Hi
Bro I'm in class 11 rn n I took pcb stream for my higher studies
I was searching for a lecture on biomolecules and this vid popped up , I feel so nostalgic seeing this video how th lectures were so short everything was so easy 😂
Ohhh bhaiya! Btw I am in 8th grade
Broooo.... I am also from 9th because in 8 class we did not study so there is difficulty in 9th
easy? bro it’s so hard nd complicated 😭😭 i cant even imagine how hard higher classes will be 😭😭
You are explaining well I appreciate you and hope you teach each and every one good job ❤️❤️👍👍👍👍
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@@MagnetBrainsEducation ok
nerve cells need a larger area to transfer information that's why it is longer comparing to the other cells.
Nelisa Meel, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
Pagal
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Nerve cells are usually very long and branched so that it helps in transmission of signals or electrical impulses over all parts of the body. They divide and re-divide and so cover a large surface area of the body and every portion receives the signals from the central nervous system
Thank you for your comment! We're glad you're enjoying our videos and learning more about nerve cells! Keep up the good work!
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@@MagnetBrainsEducation24:16 chapri
@@Abhimanyu2704.
@@Abhimanyu2704.
Thank you ma'am
For helping me before 1day ago of my sci exam and I have got better in my understanding of biology..once again thank you ma'am 😊
U need english classes too
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Mem i have I one question🙋
1- name the smallest cell in our body.
Tera matha
Are you sure...
Thank you so much magnet Brains
In lockdown it help me to study easily
I have recommended this channel to my friends 😊
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8 :33 So when the cell reaches a size too large, it will divide into smaller cells in order to maintain a surface area/volume ratio that is more favorable to the functioning of the cell. Therefore, cells remain small in order to survive.
Thank You Mam I have watched started to end I have very easily understood Mam
Thanks for watching our video! We are glad that it was helpful in understanding the concepts. If you need any further help, please let us know. We're here to help you succeed!
Nerve cells are long and have projections so that they can make contracts with other nerve cells and carry messages over long distance ( between brain and other body parts...
Nerve are long because they receives and transfers messages thereby helping to control and coordinate the working of different parts of the body
Thanks ma'am👍
Ya
Ya bro
Loved your teaching style ma'am you made my each and every doubt clear. Thank you for giving us your time.
Thanku mam ☺️☺️
so that it helps in transmission of signals or electrical impulses over all parts of the body easily.
Look at her how she looks
08:45
What??
😂😂😂😂😂
@@clutchgaming8594 Amoeba tto koi b shape lellatta hai....... can't you see her expression
🤣
Mam your teaching style is just very ausumn ☺, can you or have you made a video on ch reproduction??
shiny✨⭐, Thanks a lot for checking out the video and replying back. Do recommend Magnet Brains to your friends. Also do checkout the Magnet Brains website, all video lectures are organized on the site for easy access.
Yah mam
Mam tomorrow is my exam so thankyou for teaching ❤ but in the exercise questions you tick TRUE in muscles cell are branched mam but it's wrong because nerve cells are branched
Thank u magnet brain to letting us learn the lesson by such a qualified teachers
Thank U so much mam
Mam," Nucleus ki Exact definition bata dijiye please mam ,🙏🏻 My Annual Examination started from Monday 7feb. 2022
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Mam, where are you from?
Thank u mam for teaching i like your teaching style it is come in my half year exam I got 79 marks in sceince
AFK Gaming, Thanks a lot for watching the Magnet Brains videos. Please recommend us among your friends.
Your teaching way is 1000 times better than my school❤
Btw I have a doubt pls clear it
•I have confusion between vacuole and nucleolus because u said that both r between in the nucleus so pls clear the position of both plsssssss🙏🙏
She was nothing but a great teacher
Poop
Amoeba means something else in our language😂
plzz tell me i whana knoww that
@@saifzargar430 how can i say that here😂😂😂😂
Which language I will use Google
What is the name of your language?
Thank you so much mam for teaching this coz now I'm clear with this chapter. You are the best teacher as you explain everything clearly. I didn't know that much hindi, but now I can understand hindi as u speak up in hindi. TYSM
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Tysm 🤩... It really helped 👍🏻
29:45, Ma'am I had a doubt, in my science book it is given that muscle cells are spindle, so is it true or false??
Thanks for reaching out with your question! You are correct that muscle cells are spindle-shaped.
Congratulations to all who passed 7 th class 👏.
Lockdown me aise hi pass🤔🤔😂😂
Bhai lockdown tha 🤣🤣🤣🤣🤟🤟🤟
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Easy lockdown pass
Very well explained... Love the channel and the teacher
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