blood stem cell on white background. hand drawn scientific microbiology in sketch style

cell blood stem vector immune system myeloid white leukocyte type hematopoiesis biology plasma hematopoietic natural basophil medical immunology antibody granulocyte anatomy hematology antigen haematopoietic lymphoblast cellular body element lymphoid structure science analysis myeloblast sketch drawing hand drawn ink etch pencil education poster graphic isolated research draw therapy treatment anatomical background scientific microbiology style background style