Sistem organa za kretanje je ono što ti omogućava da... Show more
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Updated May 22, 2026
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Anatomija sistema pokreta
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Osnovni delovi sistema za kretanje
Tvoje telo je kao savršena mašina koju čine skelet (svih 206 kostiju zajedno) i mišići koji rade u tandemu. Kosti su tvoja unutrašnja potpora, dok mišići imaju supermoć da se skraćuju i opuštaju kako bi pokrenuli delove tela.
Zglobovi su ključna mesta gde se kosti spajaju i omogućavaju ti da se pokrećeš. Tetive povezuju mišiće sa kostima , dok ligamenti drže kosti zajedno u zglobovima .
Naš skelet ima tri glavna dela: skelet glave (lobanja koja štiti mozak), skelet trupa (kičmenica, rebra i grudna kost) i skelet udova (ruke i noge). Jedina pokretna kost na glavi je donja vilica - zato možeš da žvačeš!
💡 Zanimljivost: Butna kost je najduža kost u tvom telu, a kičmenica ima oblik dvostrukog slova S što joj daje elastičnost!
Građa kostiju i vrste zglobova
Svaka kost je zapravo živa struktura! Spolja je pokrivena pokosnicom, ispod koje je čvrsto koštano tkivo, a unutra se nalazi sunđerasto tkivo. Tu se krije koštana srž - fabrika koja pravi tvoje krvne ćelije.
Po obliku, kosti mogu biti duge (kao butna kost), kratke (u šaci i stopalu) ili pljosnate (kao kosti lobanje). Svaki oblik ima svoju posebnu funkciju.
Zglobovi su kao šarkovi na vratima, samo mnogo pametniji! Nepokretni zglobovi drže kosti srasle (kao na lobanji), polupokretni dozvoljavaju malo kretanja (između kičmenih pršljenova), a pokretni zglobovi ti omogućavaju velika kretanja poput savijanja ruke ili noge.
💡 Za test: Pokretni zglobovi imaju glatku hrskavicu i zglobnu tečnost koja ih podmazuje - kao ulje u mašini!
Kako mišići pokreću telo
Evo najkul dela - mišići nikad ne rade solo! Oni uvek rade u parovima koje zovemo antagonistički mišići. Dok se jedan grči, drugi se opušta, kao što biceps i triceps rade kada savijaš i opružaš ruku.
Imaš tri vrste mišićnog tkiva: poprečno-prugasti mišići koje svesno kontrolišeš (oni na rukama i nogama), glatki mišići koji rade automatski u organima, i srčani mišić koji pumpa tvoje srce bez tvoje dozvole.
Kada šutiraš loptu, mozak pošalje komandu preko nerava, mišići se grče, povlače tetive, a tetive pokreću kosti kroz zglobove. Čak i kada stoji mirno, tvoji mišići održavaju tonus - blago su zategnuti da te drže uspravno.
💡 Zapamti za test: Tetive = mišić + kost, Ligamenti = kost + kost. Ovo često pitaju!
Zdravlje i problemi sistema za kretanje
Za jake kosti trebaš kalcijum (pij mleko, jedi sir!) i vitamin D koji dobijaš od sunca. Redovna fizička aktivnost jača mišiće i čini ceo sistem otpornijim na povrede.
Pravilno držanje tela je super važno! Ako ne sediš i ne stojiš pravo, možeš dobiti skoliozu (krivljenje kičme u stranu), kifozu (pogrbljenost) ili lordozu (previše izvijenu kičmu).
Najčešće povrede su prelom (naprsnuće kosti), uganuće (istezanje ligamenata) i iščašenje (kada kost ispadne iz zglobnog ležišta). Srećom, tvoje telo je neverovatno u oporavku!
💡 Ključna razlika: Kosti su pasivni deo sistema (ne mogu same da se pokrenu), a mišići su aktivni deo (oni pokreću sve ostalo)!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in Biologija
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4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
Anatomija sistema pokreta
Sistem organa za kretanje je ono što ti omogućava da igraš fudbal, plesaš ili jednostavno hodaš do škole. Čine ga kosti koje daju telu oblik i čvrstinu, te mišići koji ih pokreću svojom snagom.
Osnovni delovi sistema za kretanje
Tvoje telo je kao savršena mašina koju čine skelet (svih 206 kostiju zajedno) i mišići koji rade u tandemu. Kosti su tvoja unutrašnja potpora, dok mišići imaju supermoć da se skraćuju i opuštaju kako bi pokrenuli delove tela.
Zglobovi su ključna mesta gde se kosti spajaju i omogućavaju ti da se pokrećeš. Tetive povezuju mišiće sa kostima , dok ligamenti drže kosti zajedno u zglobovima .
Naš skelet ima tri glavna dela: skelet glave (lobanja koja štiti mozak), skelet trupa (kičmenica, rebra i grudna kost) i skelet udova (ruke i noge). Jedina pokretna kost na glavi je donja vilica - zato možeš da žvačeš!
💡 Zanimljivost: Butna kost je najduža kost u tvom telu, a kičmenica ima oblik dvostrukog slova S što joj daje elastičnost!
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Građa kostiju i vrste zglobova
Svaka kost je zapravo živa struktura! Spolja je pokrivena pokosnicom, ispod koje je čvrsto koštano tkivo, a unutra se nalazi sunđerasto tkivo. Tu se krije koštana srž - fabrika koja pravi tvoje krvne ćelije.
Po obliku, kosti mogu biti duge (kao butna kost), kratke (u šaci i stopalu) ili pljosnate (kao kosti lobanje). Svaki oblik ima svoju posebnu funkciju.
Zglobovi su kao šarkovi na vratima, samo mnogo pametniji! Nepokretni zglobovi drže kosti srasle (kao na lobanji), polupokretni dozvoljavaju malo kretanja (između kičmenih pršljenova), a pokretni zglobovi ti omogućavaju velika kretanja poput savijanja ruke ili noge.
💡 Za test: Pokretni zglobovi imaju glatku hrskavicu i zglobnu tečnost koja ih podmazuje - kao ulje u mašini!
Sign up to see the contentIt's free!
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Kako mišići pokreću telo
Evo najkul dela - mišići nikad ne rade solo! Oni uvek rade u parovima koje zovemo antagonistički mišići. Dok se jedan grči, drugi se opušta, kao što biceps i triceps rade kada savijaš i opružaš ruku.
Imaš tri vrste mišićnog tkiva: poprečno-prugasti mišići koje svesno kontrolišeš (oni na rukama i nogama), glatki mišići koji rade automatski u organima, i srčani mišić koji pumpa tvoje srce bez tvoje dozvole.
Kada šutiraš loptu, mozak pošalje komandu preko nerava, mišići se grče, povlače tetive, a tetive pokreću kosti kroz zglobove. Čak i kada stoji mirno, tvoji mišići održavaju tonus - blago su zategnuti da te drže uspravno.
💡 Zapamti za test: Tetive = mišić + kost, Ligamenti = kost + kost. Ovo često pitaju!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Zdravlje i problemi sistema za kretanje
Za jake kosti trebaš kalcijum (pij mleko, jedi sir!) i vitamin D koji dobijaš od sunca. Redovna fizička aktivnost jača mišiće i čini ceo sistem otpornijim na povrede.
Pravilno držanje tela je super važno! Ako ne sediš i ne stojiš pravo, možeš dobiti skoliozu (krivljenje kičme u stranu), kifozu (pogrbljenost) ili lordozu (previše izvijenu kičmu).
Najčešće povrede su prelom (naprsnuće kosti), uganuće (istezanje ligamenata) i iščašenje (kada kost ispadne iz zglobnog ležišta). Srećom, tvoje telo je neverovatno u oporavku!
💡 Ključna razlika: Kosti su pasivni deo sistema (ne mogu same da se pokrenu), a mišići su aktivni deo (oni pokreću sve ostalo)!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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Most popular content in Biologija
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Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user