system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do nosebleeds happen so suddenly and bleed so profusely as composed to other kinds of cuts or wounds of similar sizes?
gpt
Because unlike any other mucous membrane laden orifice on your body, your nose is the only one you've been fingering without abandon for the past 20 years. This has resulted in the expansion of superficial capillaries along a layer of tissue with a fairly thin epithelial layer. So all that mining for nose gold means that anytime the humidity drops by a single percentage point, you get yourself a gusher. 

Tl;Dr: ☝️ blood supply + 👇tissue protection + 👃👈 = 🤧