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

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