you’d think this might happen pretty often, considering how small and pathetic capillaries seem compared to their hunky muscular relatives, but nope
let me introduce you to this little trick, the Law of LaPlace:
tension exerted on the wall of a vessel = pressure x radius
guess how small the radius of a capillary is? how low the pressure is?
credit: Steve Gschmeissner
Blood cell development. A blood stem cell goes through several steps to become a red blood cell, platelet, or white blood cell.
A colorized electron microscope image captures delicate chains of streptococcus in a laboratory sample. Though some strep infections can be deadly, many strains are harmless—among the thousands of benign beings that make their home in our bodies.
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