A doctor would probably be good. Lots of water, some soap, maybe antibiotic ointment if you have it, probably wrapped it up in cloth bandages or something clean and holds firm.
Usually I just let scrapes go, but I never had anything more than some scuffed hands and knees. Lots of blood sounds like it needs medical attention, maybe stitches?
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"But...gorillas don't have claws." - Azazel22
"Broccoli gorillas do." - McMoogle