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I learned that all of us have trillions of different cells that keep us moving connecting to our brain. I also learned that Robert Hooke accused Issac Newton of plagiarism and taking over his ideas in his works.

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Robert a man who drew tiny bugs for instance lice and much more he ended up selling a book in which contained his art work within all of the pages. another man named Antoine being the first to see cells and being famous for that discovery made.

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Microscopes and lenses

Although cells vary in size, they’re generally quite small. For instance, the diameter of a typical human red blood cell is about eight micrometers (0.008 millimeters). To give you some context, the head of a pin is about one millimeter in diameter, so about 125 red blood cells could be lined up in a row across the head of a pin. With a few exceptions, individual cells cannot be seen with the naked eye, so scientists must instead use microscopes (micro- = “small”; -scope = “to look at”) to study them. A microscope is an instrument that magnifies objects otherwise too small to be seen, producing an image in which the object appears larger. Most photographs of cells are taken using a microscope, and these pictures can also be called micrographs.From the definition above, it might sound like a microscope is just a kind of magnifying glass. In fact, magnifying glasses do qualify as microscopes; since they have just one lens, they are called simple microscopes. The fancier instruments that we typically think of as microscopes are compound microscopes, meaning that they have multiple lenses. Because of the way these lenses are arranged, they can bend light to produce a much more magnified image than that of a magnifying glass.In a compound microscope with two lenses, the arrangement of the lenses has an interesting consequence: the orientation of the image you see is flipped in relation to the actual object you’re examining. For example, if you were looking at a piece of newsprint with the letter “e” on it, the image you saw through the microscope would be “ə." \[^{1}\] More complex compound microscopes may not produce an inverted image because they include an additional lens that “re-inverts” the image back to its normal state.What separates a basic microscope from a powerful machine used in a research lab? Two parameters are especially important in microscopy: magnification and resolution.

Magnification is a measure of how much larger a microscope (or set of lenses within a microscope) causes an object to appear. For instance, the light microscopes typically used in high schools and colleges magnify up to about 400 times actual size. So, something that was 1 mm wide in real life would be 400 mm wide in the microscope image.

The resolution of a microscope or lens is the smallest distance by which two points can be separated and still be distinguished as separate objects. The smaller this value, the higher the resolving power of the microscope and the better the clarity and detail of the image. If two bacterial cells were very close together on a slide, they might look like a single, blurry dot on a microscope with low resolving power, but could be told apart as separate on a microscope with high resolving power.
[What determines resolving power?]

Both magnification and resolution are important if you want a clear picture of something very tiny. For example, if a microscope has high magnification but low resolution, all you’ll get is a bigger version of a blurry image. Different types of microscopes differ in their magnification and resolution.Light microscopes

Most student microscopes are classified as light microscopes. In a light microscope, visible light passes through the specimen (the biological sample you are looking at) and is bent through the lens system, allowing the user to see a magnified image. A benefit of light microscopy is that it can often be performed on living cells, so it’s possible to watch cells carrying out their normal behaviors (e.g., migrating or dividing) under the microscope.

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We have 37 trillion cells in our body. Robert Hooky was the first person to look in a microscope and see cells. Robert Hooky was the first one to see dead cells too I think.

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I learned that a co2 molecule is 1 billionth of a meter.

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I learned that we have 37 trillion blood cells. Also Robert Hook named the word cells. And Antonio Van Leeuwenhoek was the one who made the microscope.

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I learned that we have 37 trillion blood cell and I also learned that we all have different blood cells and some come in different shapes and sizes 

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I learned that we have 37 trillion blood cell and I also learned that we all have different blood cells and some come in different shapes and sizes 

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Katelyn Villanueva per.7

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I learned that Antonie Van Leeuwenhoek was the first person to see living cells. Another one is that Robert Hook made the word called cells

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I learn is that humans have 37 trillion blood cell and a another thing that I learned is Antoine Van Leeuwenhoek invented a microscope and became super popular.

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Step 1. Watch the Khan Academy Step 2. Type in your full name and period #. Step 3. Type an explanation of the website and what you learned or take a picture of your notes. 4. Click Post it.

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Step 1. Watch the Khan Academy Step 2. Type in your full name and period #. Step 3. Type an explanation of the website and what you learned or take a picture of your notes. 4. Click Post it.

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Cell theory (video) | Introduction to cells | Khan Academy

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.