cut open

[user_gary]

dissect = to cut open something, especially a dead body or a plant, and study its structure.

What does `cut open' mean in this sentence?

Please explain it.

Also, Can I say (What is `cut open' mean in this sentence?)

[Humble]

Hi, Gary,
What does cut open mean in this sentence?
Cut open means make a cut to see what's inside doing it in a way that would not result in dividing the thing you are cutting into two pieces.
When you cut bread, you get pieces of bread. When you cut open a frog, you still have it whole, but with a hole.