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

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