What type of bone has a punched out or Swiss cheese appearance?

The type of bone that has a punched-out or Swiss cheese appearance is cancellous bone, also known as spongy bone.

Here's why:

* Structure: Cancellous bone is characterized by a network of interconnected bony plates called trabeculae. These trabeculae create a lattice-like structure with spaces filled with bone marrow, giving it a porous or spongy appearance.

* Function: The porous structure of cancellous bone provides lightweight strength and support, as well as serving as a site for blood cell production within the bone marrow.

Important note: While cancellous bone is often described as having a "Swiss cheese" appearance, the holes in cancellous bone are much smaller and more irregular than the holes in Swiss cheese.