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Updated 2 Mar 2026
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As organelas celulares são estruturas especializadas que permitem o funcionamento... Show more
A membrana biológica é essencial para todas as células, delimitando-as e permitindo a troca controlada de substâncias com o meio externo. Ela só pode ser visualizada com microscópio eletrônico, mas está presente tanto em células procarióticas quanto eucarióticas.
O citoplasma é o líquido transparente que preenche o interior da célula, composto principalmente por água, substâncias dissolvidas e proteínas. É nele que ocorrem as principais reações metabólicas e onde encontramos as diversas organelas celulares.
A parede celular é exclusiva das células vegetais e possui duas camadas: a primária (elástica, com pectina e celulose) e a secundária (mais rígida, com celulose e lignina). Ela confere forma e proteção à célula, permitindo trocas de substâncias através de estruturas chamadas plasmodesmos.
💡 Curiosidade: Embora o núcleo seja visível ao microscópio óptico comum, muitas outras organelas só podem ser observadas com microscópios eletrônicos de alta potência!
Os ribossomos são as "fábricas de proteínas" da célula. Podem ser encontrados livres no citoplasma ou aderidos às membranas do retículo endoplasmático. Eles traduzem as informações genéticas e montam as proteínas a partir de aminoácidos.
O retículo endoplasmático forma uma rede de canais envolvidos por membranas. Existem dois tipos: o liso (sem ribossomos), responsável pela síntese de lipídios, e o rugoso (com ribossomos), que atua na produção de proteínas.
O complexo de Golgi é formado por compartimentos achatados empilhados que processam, empacotam e direcionam substâncias produzidas pela célula. É como o "centro de distribuição" celular, modificando proteínas e formando vesículas para transporte.
⚠️ Atenção! As estruturas de armazenamento como lisossomos, peroxissomos e vacúolos têm funções vitais na célula: os lisossomos digerem materiais, os peroxissomos desintoxicam a célula e os vacúolos (maiores nas células vegetais) armazenam substâncias.
As mitocôndrias são as "usinas de energia" da célula, delimitadas por duas membranas. O que as torna únicas é que possuem seu próprio DNA (circular) e ribossomos, funcionando de forma semi-autônoma para produzir ATP, a molécula energética celular.
Os cloroplastos são organelas exclusivas das células vegetais, responsáveis pela fotossíntese. Assim como as mitocôndrias, possuem duas membranas, DNA próprio e ribossomos. É dentro deles que a energia solar é convertida em energia química.
Nas plantas também encontramos outros tipos de plastos especializados: os cromoplastos, responsáveis pela coloração em flores e frutos, e os leucoplastos, que são incolores e funcionam como estruturas de armazenamento de substâncias.
🌱 Você sabia? A cor verde das plantas vem da clorofila presente nos cloroplastos, enquanto as cores vibrantes de muitas flores e frutos resultam dos pigmentos armazenados nos cromoplastos!
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.
You can download the app in the Google Play Store and in the Apple App Store.
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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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
As organelas celulares são estruturas especializadas que permitem o funcionamento das células. Cada uma delas desempenha funções específicas e essenciais para a manutenção da vida celular, formando um complexo sistema de "pequenas fábricas" dentro das células.
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A membrana biológica é essencial para todas as células, delimitando-as e permitindo a troca controlada de substâncias com o meio externo. Ela só pode ser visualizada com microscópio eletrônico, mas está presente tanto em células procarióticas quanto eucarióticas.
O citoplasma é o líquido transparente que preenche o interior da célula, composto principalmente por água, substâncias dissolvidas e proteínas. É nele que ocorrem as principais reações metabólicas e onde encontramos as diversas organelas celulares.
A parede celular é exclusiva das células vegetais e possui duas camadas: a primária (elástica, com pectina e celulose) e a secundária (mais rígida, com celulose e lignina). Ela confere forma e proteção à célula, permitindo trocas de substâncias através de estruturas chamadas plasmodesmos.
💡 Curiosidade: Embora o núcleo seja visível ao microscópio óptico comum, muitas outras organelas só podem ser observadas com microscópios eletrônicos de alta potência!
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Improve your grades
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By signing up you accept Terms of Service and Privacy Policy
Os ribossomos são as "fábricas de proteínas" da célula. Podem ser encontrados livres no citoplasma ou aderidos às membranas do retículo endoplasmático. Eles traduzem as informações genéticas e montam as proteínas a partir de aminoácidos.
O retículo endoplasmático forma uma rede de canais envolvidos por membranas. Existem dois tipos: o liso (sem ribossomos), responsável pela síntese de lipídios, e o rugoso (com ribossomos), que atua na produção de proteínas.
O complexo de Golgi é formado por compartimentos achatados empilhados que processam, empacotam e direcionam substâncias produzidas pela célula. É como o "centro de distribuição" celular, modificando proteínas e formando vesículas para transporte.
⚠️ Atenção! As estruturas de armazenamento como lisossomos, peroxissomos e vacúolos têm funções vitais na célula: os lisossomos digerem materiais, os peroxissomos desintoxicam a célula e os vacúolos (maiores nas células vegetais) armazenam substâncias.
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Improve your grades
Join milions of students
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As mitocôndrias são as "usinas de energia" da célula, delimitadas por duas membranas. O que as torna únicas é que possuem seu próprio DNA (circular) e ribossomos, funcionando de forma semi-autônoma para produzir ATP, a molécula energética celular.
Os cloroplastos são organelas exclusivas das células vegetais, responsáveis pela fotossíntese. Assim como as mitocôndrias, possuem duas membranas, DNA próprio e ribossomos. É dentro deles que a energia solar é convertida em energia química.
Nas plantas também encontramos outros tipos de plastos especializados: os cromoplastos, responsáveis pela coloração em flores e frutos, e os leucoplastos, que são incolores e funcionam como estruturas de armazenamento de substâncias.
🌱 Você sabia? A cor verde das plantas vem da clorofila presente nos cloroplastos, enquanto as cores vibrantes de muitas flores e frutos resultam dos pigmentos armazenados nos cromoplastos!
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.
You can download the app in the Google Play Store and in the Apple App Store.
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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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
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