What are the two main types of bone tissue?

The two main types of bone tissue are:

1. Compact Bone Tissue: This is the denser, stronger of the two types of bone tissue. It is found primarily in the shaft of long bones and makes up about 80% of the adult skeleton. Compact bone tissue provides strength and support and helps resist the stress produced by weight and movement.

2. Spongy Bone Tissue: Also known as cancellous or trabecular bone, this type of bone tissue is lighter and less dense than compact bone. It is found at the ends of long bones, as well as in the pelvic bones, ribs, skull, and the vertebrae in the spinal column. Spongy bone tissue makes up about 20% of the adult skeleton. Its porous, honeycomb-like structure makes it ideal for metabolically active tissues like bone marrow.