In most cases, the part of a cell or tissue that we want to look at isn't naturally fluorescent, and instead must be labeled with a fluorescent dye or tag before it goes on the microscope.

In this video we will explore the microscopic structure of bone or the Harvesian system in depth. Discover the difference between spongy and compact bone, learn about the function of …

One group, the granulocytes, includes neutrophils, eosinophils, and basophils, all of which have granules in their cytoplasm when stained and viewed on a microscope. The other group, the …

Label the parts of the animal cell. Click each dot on the image to select an answer.

The great majority of the cell divisions that happen in your body involve mitosis. During development and growth, mitosis populates an organism’s body with cells, and throughout an …

Check your understanding! You are looking at a recently discovered unicellular organism using a powerful microscope. How can you determine if the organism is a prokaryote or eukaryote? …

Eukaryotic cells contain membrane-bound organelles (such as the nucleus and mitochondria), while prokaryotic cells do not. DNA in eukaryotic cells is found inside the nucleus, while DNA …

And because that looks smooth through our microscope, it has been called, you can imagine, smooth endoplasmic reticulum. There are things known as golgi bodies. Once again, another …

Within cells, special structures are responsible for particular functions. For example, mitochondria help release energy that the cell can use for other tasks, and the nucleus contains the genetic …

Explore the structure and function of chloroplasts and mitochondria, key organelles in energy conversion and cellular processes, on Khan Academy.