1-2 Basic concepts

The image is a liver section observed under a microscope at a low magnification.
You can see a large pink area, but more details cannot be seen at this magnification. In sections of other organs observed at the same magnification, it would be possible to observe many of their features or characteristic structures, such as layers that make up the organ, or blood vessels or large nerves.
There are many small clear spaces in the image. Most of them are the empty cavities of blood vessels, also called the lumen of blood vessels (See the meaning of “Lumen” in the GLOSSARY in the main MENU.