bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells
Okay so when you cut open a bone, you'll see multiple layers. and the inner part looks like a sponge. It has lots of little holes an pores. Compact bone is a type of bone that had no pores or holes. It is straight up bone.
