Deoxygenated blood is actually a darker shade of crimson; This can be present in veins, and can be noticed in the course of blood donation and when venous blood samples are taken. It is because the spectrum of light absorbed by hemoglobin differs between the oxygenated and deoxygenated states.[35] https://nightmare-mu-online-seaso78887.designi1.com/57224337/blood-castle-mu-online-options