There are “34 atishayas of tirthankar”(uncommon thing, which are not present in normal people). One of the 34 atishay is that Tirthankara’s blood is white in colour. I don’t know whether snake bite him or not. But if snake bit him and white colour liquid start flowing out, it was blood and not milk.

Since no tirthankar is present in Bharat Kshetra at present, we cannot say anything according to Modern Science. As modern science first analyze things, before giving any explanation.

The text I am going to write after this is from my thinking only. I may be wrong too.

Human blood contains 4 parts, Red blood cells(RBC), White blood cells(WBC), platelets and plasma.

According to me, there may be no RBC’s (red blood cells) present in Tirthankar’s blood, as the redness of blood comes from RBC. There may be other 3 parts of present in Tirthankar blood.