A: Hey, I’m reading this really interesting article about the human body.
B: Yeah? Well, we know all about that from biology lessons.
A: No, we didn’t learn much at all at school! They’re discovering loads more things all the time. Really amazing things! Did you know that only about one tenth of the cells in your body are really you? The rest are bacteria.
B: What? I’m not really me?
A: No, of course you are you, but you also have millions, or trillions, of bacteria in you.
B: Eeeeuuugh!
A: No, they’re mostly really helpful. Someone did an experiment to see if animals can live without bacteria, and he found that a lot of them died or had to have a special diet. Animals need bacteria to digest food, you see. So we’re better off with bacteria.
B: Unless the bacteria are bad.
A: Unless they are bad, but they’re nearly all good. Oh yeah, and going back to cells, do you know how many cells you have in your body?
B: Quite a lot, I’d say. A good few.
A: Yeah, but how many?
B: I don’t know. I’m not mathematical.
A: 7 octillion! That’s 7 plus 27 noughts.
B: I knew it was a lot.
A: OK, that’s an amazingly huge number, almost impossible to imagine. But the really weird thing is that most of the atoms are empty space, just air or nothingness. And if you took out the empty space, you could fit your body inside a tiny cube which measures one 500th of a centimetre on either side. That’s a box measuring 0.002 of a centimetre on each side. You’d be much too small to see.
B: Mmm, I can imagine that. It sounds like something that would happen in a really bad Hollywood movie. You know, a mad scientist goes: (funny voice) ‘I’m going to extract all the air from your body’. OK, enough facts for one day.
A: Don’t go! One last thing, did you know …
B: No.
A: Did you know that you probably have mites in your eyelashes?
B: Mites in my eyelashes? What are mites exactly anyway?
A: Yeah, they’re very small creatures, like insects, only not insects. They’re about a third of a millimetre long, so you can’t really see them. These particular mites live in eyelashes and eyebrows.
B: But in mine?
A: Well, maybe not. Only about 50% of people have them, and more older people. So you might not have any. Anyway, they’re completely harmless, they just eat dead skin.
B: Yeah, right, harmless. I really would have preferred not to know that.
A: Sorry.
B: I mean, really!
Comments
atoms are not the smallest parts of an element quarks are. even an 14 yearold knows that
Hi Snokis! Good point, you're right. And thanks to you I've just read a bit about quarks and atoms to help me understand the topic better! :) I understand that since it's so difficult to split (= divide) an atom, it's sometimes referred to as as the smallest component of an element. In fact, it's the smallest component of an element that has the chemical properties of that element. Is that right? Joanna (LearnEnglish Teens team)
There are bacteria that do not just harm to human beings, there are also others that may be used for personal gain
our body work together if missing some organ or that dont do her corresponding function this awry and not functioning properly.
The organs are very important in our life.
The human body is amazing.
bacteria are prokaryotes because they not have their well-defined organelles and not all bad for humans.
For example, a person doing much exercise can consume more than 5000 Kcal. per day
Our heart beats about 100,00 times every day.
When we touch something, we send a message to our brain at 124 mph.
I don't know how to describe but this conversation is really cute. Really love British accent. <3
If the human eye was a digital camera it would have 576 megapixels.
Womens' hearts beats faster than mens' hearts.
Your nose can remember 50000 different scents :)
A sneeze travels 100 miles per hour.
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I know two amazing facts which are 1. Sweat doesn’t smell bad. A stinky “body odour” is caused when the skin bacteria feed on sweat. Their waste products are what smell bad!
2. Just one drop of blood contains about 10,000 while blood cells and 250,000 platelets
Did you know our nose can remember 50,000 different scents?
Well, when we have a idea, our brain produces enough electricity to power a small light bulb !
Yeah, now I can understand why in the film, when the character have an idea, on their head have a light bulb :)))
Did you know every human has a tennis court in his or her body. Guess what? The average surface area of the human lungs is almost equivalent to the surface area of a tennis court.
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Did you know
1) on a clear night ,the human eye can see between 2000 to 3000 stars in the sky?
2) People generally read 25% slower from a computer screen compared to paper?
About 98 percent of our DNA is the same as Gorilla, so I believe that why they're very intelligent.
Spesking of bananas, I've heard that bananas and gingers are the same kind!
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I saw photos about mites and it is icky !
euughhh I google it, you're right
Obviously, bananas are different from human bodies. What about the similarity ? 50% of human DNA is the same as a banana.
Wow… Bananas and human have the same root?
I've got some classmates who have allergy to bananas, on the other hand, I like banana. Might this show that my DNA need more banana cells?? Anyway, I think 90% of Mr.Hormer's DNA is the same as a banana! !
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I was impressed by the fact that most of the atoms are only empty space ,just air or nothinges and if it took it out our body would be very small. This way we are empty. It is rediculous.
I am very surprised because I did not know that there were so many body cells. Did you know that a nap of 20 minutes is good for our health. In fact, we help to improve our concentration, mood and productivity.
Hey ivantorre! I know that 20min. nap (particularly in the afternoon) is good for our health!
Did you know how long a person's DNA is when it is stretched?
It's 2.5million time around the earth!! A great mystery in our body!!
In my case I find it very interesting that something like bacteria are so useful and necessary to live and that most of the cells are atoms empty , air or nothing. Another interesting factor is that when you look at someone you love, your pupils dilate and when you look at someone you hate,occur the same. Also, an interesting fact is that foot thumbs have two bones
, while others have three bones.
Wow, interesting! In that sense, nobody tells if sb loves me or hates me by judging their eyes?! I always tend to think the former, cause I'm a kind of optimist!
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Hi Aitorze. I didn't know that about the big toe (that it only has two bones). That is interesting. Thanks for sharing :)
Jonathan (LearnEnglish Teens Team)
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