The nature of the coagulation is not yet completely understood.
The salts of iron quickly cause coagulation of the blood, and the clot plugs the bleeding vessels.
" Serumalbumin," or " blood-albumin," possibly C450H720N116S60140,, occurs in blood-serum, lymph, chyle, milk, &c.; its coagulation temperature is about 67°.
Fibrinogen is insoluble in water, but soluble in salt solutions; it has three different coagulation temperatures, 56°, 6 7°, 75°.
Fibrin, produced from fibrinogen by a ferment, is a jelly-like substance, coagulable by heat, alcohol, &c. The muscle-albumins include " myosin " or paramyosinogen, a globulin, which by coagulation induces rigor mortis, and the closely related " myosinogen " or myogen; myoglobulin and myoalbumin are also found in muscles.