Interstitium

The interstitium is like a big sponge inside your body that soaks up all the water and other fluids that surround your organs and tissues. It's also made up of little spaces between cells where nutrients, oxygen, and waste products flow through. Think of it as a network of water pipes, kind of like the plumbing in your house.

Scientists recently discovered that this "sponge" is actually its own organ! It's made up of lots of different kinds of cells that work together to help support and protect your body. They also found that it plays an important role in helping your body fight off infections and heal from injuries.

So, the interstitium is like a big, important sponge that keeps all the fluids in your body balanced and helps keep you healthy.