Explore this important protein in the image gallery below
Collagen is a fibrous protein that provides structural support to tissues. In our bodies, it is found in connective tissues in bone, teeth, tendons, ligaments, cartilage, artery walls and elsewhere. Collagen accounts for around one-third of all protein in vertebrates.
1. Calcified bone interface
2. Ruptured tendon
3. Smooth muscle cells
5. Collagen fibrils and mast cell granules
6. Degenerating collagen fibrils in glaucoma
7. Collagen fibrils with proteoglycans
8. Meshwork of collagen fibrils
9. Type II collagen fibril in vitro
11. Network of collagen fibrils
12. Collagen fibril forming in vitro
13. Collagen network
Image research by Iona Twaddell and captions by Rosie Cotter, adapted from Wellcome Collection unless stated otherwise.