Biology
Bone Structure and Composition
Quick fact
Bones are about 30% organic (collagen) and 70% inorganic (minerals like calcium phosphate).
Why this is interesting
Did you know that your skeleton is made of living tissue that constantly rebuilds itself? Bones are not just rigid structures—they’re dynamic and full of life.
Read the full explanation
Understanding Bone Structure and Composition
Bones are made up of a combination of collagen, which provides flexibility, and minerals such as calcium and phosphorus, which give bones their strength. Inside the bone, there's also marrow that produces blood cells. This unique structure allows bones to be both strong and resilient.
A deeper explanation
The composition of bones ensures they can withstand mechanical stress while remaining lightweight. Collagen forms a framework that traps minerals like calcium phosphate, creating a hard outer layer. Osteocytes, the living cells within bone tissue, help regulate mineral balance and repair damage over time. This structure is vital for supporting movement and protecting internal organs.