Total length of collagen type 1 in the human body
|Human Homo sapiens
|Smejkal GB, Fitzgerald C. Revised Estimate of Total Collagen in the Human Body. Int. J Proteomics Bioinformatics 2017, 1, 3-4 p.3 right column top paragraph
|P.3 left column bottom paragraph: "Even by the most conservative estimate, if all of the collagen type 1 monomers in the human body were outstretched and lined end to end, the resulting filament would span approximately 3×10^14 m. Remarkably, this length would trace the orbit of the planet Neptune over ten times. To put this distance into better perspective, travelling at an average speed of 5.4 km per second, Neptune has completed only one orbit since its discovery in 1846."