Factors that can lead to mutations

the cell is the smallest structural and functional unit of living organisms, which can exist on its own. therefore, it is sometimes called the building block of life. some organisms, such as bacteria or yeast, are unicellular—consisting only of a single cell—while others, for instance, mammalians, are multicellular.

the most likely explanation for this is that his wounds have started to scab over and that stops the bleeding.