Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacademy.org/science/b... Introduction to bacteria More free lessons at: www.khanacademy.org/video?v=TD...
You are the BEST! I've learned so much from you as I work toward my nursing degree. My son (10) comes home from school every day and wants to do his "work" on Kahn academy...thank you!
every time i need better understanding of a concept, I always youtube it. I seem to find your presentations over and over again and I have to say I always walk away with a much better understanding vs a text book or class lecture. Thanks!
I honestly think you have a photographic memory or can memorize a whole ton of information and truly outwit and teacher, by far one of the best teachers. Thank you very much!!
you are the best . other channels are unable to explain this all with high animations but you do it with just words and handmade drawings . salute you .
Like at 6:35, he tends to repeat things as he types them. I find that this subconsciously REALLY helps me to retain the information. Khan is awesome. I have downloaded all of his videos for future reference. Thanks!
Anja Ceklic(Period 5) Bacteria Video... I liked this video and how the guy explained the different aspects of how bacteria work. I learned that in one human cell we have 20 bacteria and all the bacteria on and in us make us us. The drawing of the eukarya and bacteria helped me understand that concept better. A question I have is do we have antibiotics that target only bad bacteria and do not kill good bacteria as well?
Question about looking at bacteria under a microscope. So if your looking under a microscope and see rod bacteria in chains it could be streptobacillus. But anthrax is also a bacillus bacteria that grows in chains. I know strepobacillus is gram - and anthrax is gram + . But how could you distinguish to similar bacteria apart?
There has never been a video by this guy that I have not learned at least one interesting thing from, even for a topic I have never ever studied before. You should be EXTREMELY proud of what you are doing for education.
I was reading up on Eukaryotes vs Prokaryotes which brought me to your page on The Difference Between Bacteria and Viruses which gave me a link to this page and am thrilled I came. You are so interesting to listen to and your 'course' is so fascinating. I've never watched a video on viruses that was so flawlessly and easily demonstrated. Your passion shines through and makes it all the more interesting. Kudos on clarifying and illustrating a subject that can quickly get extremely intricate. Loved every minute of it! Thanks so much.
Although the famous notion that bacterial cells in the human body outnumber human cells by a factor of 10:1 has been debunked. And the concept today is that are approximately 39 trillion bacterial cells in the human microbiota as personified by a "reference" 70 kg male 170 cm tall, whereas there are 30 trillion human cells in the body. This means that although they do have the upper hand in actual numbers, it is only by 30%, and not 900%.. This video is GOLD, khan academy is one of the reason that many other sites those days are making a really admirable effort in the field of visualsing medicene and serve it to medical students and all kinds of persons that are intrested on it. So khan made a big step towards a new era and we are so thankful that people like Shall exist. GOOD JOB GUYSS!!!!
Waw ! You are very fantastic, and talented. Just like that it took you two seconds to draw a really good face that it would take me for example at least ten minutes. Very good explanation thank you so much !
hey i love your videos they are full of information can you talk about structures of eukaryotic and prokaryotic cells and what is the program youre using ?
SHANTI - I would like to learn more about the mutations of bacteria when the genes are switching back and forth and how this works. I think that it is very interesting that for every one cell in our body we have 20 bacteria!!
I really hate to waste food but this experiment may help you to understand germ theory. If you take piece of bread and firmly press your index finger of your unwashed hand on on corner and then a properly washed hand's index finger on the opposite corner and wait a few days, I'm certain the corner that has been touched with a unwashed hand will look, moldy and defiled (don't eat the bread, throw away promptly afterwards)
Great video. Only updating the information on the proportion of bacterias and cells in our body. It's about the same: 30 trillion each. Source: report from Israel.
Just one thing I thought should be clarified: The majority of prokaryotic organisms have cell walls. That means that both Bacteria and Archaea do *tend* have cell walls, but they're not made from cellulose (so they're not the same as the ones you'd find in eukaryotic plant cells, for example).
I am sorry that your three schools were ineffective for you. I appreciate my education and the system that delivered it. It did not hurt that I have had a few outstanding teachers. Your mileage may vary.
I don't really understand what you mean. by positive or negative do you mean Gram Positive (blue or purple) or Gram Negative (Red or pink)? I'd imagine not all cells would be able to absorb crystal violet or saffarin. This sounds like a question for my Micro prof! I do know that they all have a barrier surrounding them, though, in some capacity. How else would they keep in the cytoplasm in and all the bad stuff out?
Have you ever made the notes, what the Kahn academy instructors write and draw during their explanations into pictures? I just pictured these notes as one as you scrolled up, and I thought it would make a useful pin on Pinterest! Ha, but thought I should speak up just in case.
I only took one year of Microbiology. Then met a doctor who was a microbiologist. Anyway, they don't all have walls but the ones that DON'T have walls are in the minority while the majority do have walls. With an exception as to how bacterial cell walls differ from animal cell walls.
Then they must not all have cell walls b/c you can't do gram staining with SOME bacteria. It has to have a qualifying condition of being either positive or negative. I can't remember which one and I'm not a Lab Technician. I lived with a Microbiologist though. He never mentioned that they have cell walls, but that doesn't mean they don't. But all bacteria are single-celled organisms.
I find it crazy that he can literally teach any subject, let alone being amazing at it
what I was thinking... really crazy.
ALI NHL 63 lol
Exactly , I expect a different voice every time I open a vdo of a different subject and there he is , being all glorious and what not.
CryptoAli I know been listening to him for years and I am still in awe
11 years later, here we are.
11 years an 7 months here WE are
11 years and 10 months later, here WE are
make it 12 lol
12 years later, WE ARE HERE
12 years
Casually draws out a masterpiece while explaining bacteria haha!
indeed, I was astonished too
You are the BEST! I've learned so much from you as I work toward my nursing degree. My son (10) comes home from school every day and wants to do his "work" on Kahn academy...thank you!
every time i need better understanding of a concept, I always youtube it. I seem to find your presentations over and over again and I have to say I always walk away with a much better understanding vs a text book or class lecture. Thanks!
9 years later, what's up bro how did u do in life ?
That was a really good drawing of the human head wow
TheCrazyMango82 right??!
TheCrazyMango82 yeah
Came to the comments literally just to see if anyone else was suprised at his drawing skills
These videos are really helping me to study. I was so impressed when he drew the face!
I honestly think you have a photographic memory or can memorize a whole ton of information and truly outwit and teacher, by far one of the best teachers. Thank you very much!!
We need teachers like you at schools
What an excellent video, I am doing my pharmacy technician qual in the UK and this has explained things greatly!
me and all bacteria in me would like to thank you and your bacteria for making this video. God bless you, and your bacteria
sir. i have recieved a lot of appreciation in class from these lessons.
you are the best . other channels are unable to explain this all with high animations but you do it with just words and handmade drawings . salute you .
out of every learning channel and website urs is the best u xplain stuff awsomely
YES. Do a Debate playlist!
haha "the bacteria is recording the video". Thx bacteria!
thanks to this my son understands this topic way better thanks khams
Like at 6:35, he tends to repeat things as he types them. I find that this subconsciously REALLY helps me to retain the information. Khan is awesome. I have downloaded all of his videos for future reference. Thanks!
Anja Ceklic(Period 5) Bacteria Video...
I liked this video and how the guy explained the different aspects of how bacteria work. I learned that in one human cell we have 20 bacteria and all the bacteria on and in us make us us. The drawing of the eukarya and bacteria helped me understand that concept better. A question I have is do we have antibiotics that target only bad bacteria and do not kill good bacteria as well?
Great video. Thanks. I hope you are going to continue this?
Question about looking at bacteria under a microscope. So if your looking under a microscope and see rod bacteria in chains it could be streptobacillus. But anthrax is also a bacillus bacteria that grows in chains. I know strepobacillus is gram - and anthrax is gram + . But how could you distinguish to similar bacteria apart?
There has never been a video by this guy that I have not learned at least one interesting thing from, even for a topic I have never ever studied before. You should be EXTREMELY proud of what you are doing for education.
It was really interesting Sal!!! Thank You.
Amazing. I never really understood the bacterium criteria, but thanks to you, I do! Thank you! :D
I was reading up on Eukaryotes vs Prokaryotes which brought me to your page on The Difference Between Bacteria and Viruses which gave me a link to this page and am thrilled I came. You are so interesting to listen to and your 'course' is so fascinating. I've never watched a video on viruses that was so flawlessly and easily demonstrated. Your passion shines through and makes it all the more interesting. Kudos on clarifying and illustrating a subject that can quickly get extremely intricate. Loved every minute of it! Thanks so much.
These videos are amazing !!!
Although the famous notion that bacterial cells in the human body outnumber human cells by a factor of 10:1 has been debunked. And the concept today is that are approximately 39 trillion bacterial cells in the human microbiota as personified by a "reference" 70 kg male 170 cm tall, whereas there are 30 trillion human cells in the body. This means that although they do have the upper hand in actual numbers, it is only by 30%, and not 900%.. This video is GOLD, khan academy is one of the reason that many other sites those days are making a really admirable effort in the field of visualsing medicene and serve it to medical students and all kinds of persons that are intrested on it. So khan made a big step towards a new era and we are so thankful that people like Shall exist. GOOD JOB GUYSS!!!!
wow this is great. thanks so much!
شكرا....انت الافضل
Waw ! You are very fantastic, and talented. Just like that it took you two seconds to draw a really good face that it would take me for example at least ten minutes. Very good explanation thank you so much !
Thank you very much for this information.
you sir gave me an A+, you have a new sub.
hey i love your videos they are full of information
can you talk about structures of eukaryotic and prokaryotic cells
and what is the program youre using ?
Thank you Sir
you should of mention how we classify bacteria (shape,cell wall,respiration).
But still pretty solid video. Thanks
Most beneficial channel on youtube
Thank you Khan Academy
Great video, thanx for sharing it with us!!!
shouldn't endospores be mentioned ? still a great video, thanks :)
I can just watch uand get home schoool u teach basically all u need to know in science
awesome presentation
Thank you so much helps with school
this is awesome!!
SHANTI - I would like to learn more about the mutations of bacteria when the genes are switching back and forth and how this works. I think that it is very interesting that for every one cell in our body we have 20 bacteria!!
can you make a video on electron transport chain in prokaryotes ? it would be of great help :)
pretty sure i would adopt any stance Sal takes on any debate, ever
Thanx sal I am glad from you
Khan is the best!!
Thank goodness there aren't any posts with Jevil in them
BACTERIA
Its really very interesting
I really hate to waste food but this experiment may help you to understand germ theory.
If you take piece of bread and firmly press your index finger of your unwashed hand on on corner and then a properly washed hand's index finger on the opposite corner and wait a few days, I'm certain the corner that has been touched with a unwashed hand will look, moldy and defiled (don't eat the bread, throw away promptly afterwards)
excellent video
well said, That startrek episode sounds a little like SG-1 and the goa'uld.
Sal sir draws like a pro! x'D
I think this is very cool knowing that so much of us is made from bacteria and how we must fight off so much bacteria. -Sydney
I love this guy he is the best
What are antibiotics made of? Are they prokaryotes as well?
you sir are awesome.
U are amazing.😍😍
HE'S SO GOOD !
hyyy that's a 10 year old comment omg😀
you explain wery well. you are great
he is even good at art!!!! anything this dude can't do?!?!?!? haha legend! 16:52
12:45 It's called "conjugation", Sal. The fungi do that form of reproduction as well.
the voice is perfect master!!!
yes keep it up you helped me pass a test for school
that star trek episode was where everyone started appearing drunk, right? Also, that drawing of a person is so good lol
With what program and "pen" was that Video made?
protozoa, fungi and algae please!!
He does so good at making his videos somehow not boring even if it is seemingly the most boring subject :)
What application are you using?
@Beray Uzunbay RIGHT
@khanacademy can you please do a video on genetic engineering, I think
it will be very interesting
There are a few video about plants.. Will you make some?
What program do you use to write and record
Your a genius!
Which program you are using?
Can you please do a video on fungi/fungal reproduction? It's a core component of many bio courses.
Great video. Only updating the information on the proportion of bacterias and cells in our body. It's about the same: 30 trillion each.
Source: report from Israel.
You can also explain bacterial conjugation like trading pokemon cards for the younger audience
For most bacterial cells, the cell wall is critical to cell survival, yet there are some bacteria that do not have cell walls.
Just one thing I thought should be clarified:
The majority of prokaryotic organisms have cell walls. That means that both Bacteria and Archaea do *tend* have cell walls, but they're not made from cellulose (so they're not the same as the ones you'd find in eukaryotic plant cells, for example).
I am sorry that your three schools were ineffective for you.
I appreciate my education and the system that delivered it. It did not hurt that I have had a few outstanding teachers.
Your mileage may vary.
Thanks
hey i was gonna learn this is science ;D TY I would not fail my exams now LD
I aced my Biology Test! Khan is on a roll, my average is 98%!!! GO KHAN!
what program you are using ?
Perfect
I would love to see a playlist in which you DO take sides in the debate.
Are the sprinklers going off in the background?
LOL i am fall in love with him !!!!!!
'I don't wanna say primitive cuz that's making a value judgment on these guys."
Haha, love this guy!
Why haven't you uploaded a video to UA-cam in two years :(?
I don't really understand what you mean. by positive or negative do you mean Gram Positive (blue or purple) or Gram Negative (Red or pink)? I'd imagine not all cells would be able to absorb crystal violet or saffarin. This sounds like a question for my Micro prof! I do know that they all have a barrier surrounding them, though, in some capacity. How else would they keep in the cytoplasm in and all the bad stuff out?
Sal really needs a full course of Microbiology.
Have you ever made the notes, what the Kahn academy instructors write and draw during their explanations into pictures? I just pictured these notes as one as you scrolled up, and I thought it would make a useful pin on Pinterest! Ha, but thought I should speak up just in case.
HOLA, HAY VIDEOS EN ESPAÑOL?O SUBTITULADOS
HOLA, HAY VIDEOS EN ESPAÑOL?
I only took one year of Microbiology. Then met a doctor who was a microbiologist.
Anyway, they don't all have walls but the ones that DON'T have walls are in the minority while the majority do have walls. With an exception as to how bacterial cell walls differ from animal cell walls.
Sir i wanted to have the explanation of nutrition in bacteria
Then they must not all have cell walls b/c you can't do gram staining with SOME bacteria. It has to have a qualifying condition of being either positive or negative. I can't remember which one and I'm not a Lab Technician.
I lived with a Microbiologist though. He never mentioned that they have cell walls, but that doesn't mean they don't. But all bacteria are single-celled organisms.