Why is our body not made of spongy bone tissue?

Our body is not made of spongy bone tissue because spongy bone, while lighter and capable of housing bone marrow, lacks the structural strength and stability needed for weight-bearing and protection. Compact bone, which is denser and stronger, provides the necessary support for movement and protects vital organs. The combination of compact and spongy bone allows for a balance of strength, flexibility, and lightweight structure essential for overall function. This architectural arrangement optimizes our skeletal system for both durability and resilience.