3D, ANATOMICAL, ANATOMY, ARTWORK, BACKGROUND, BIOLOGY, BLACK, BODY, CGI, DIGITALLY-GENERATED, DIMENSIONAL, ENDOCRINE, GLAND, GRAPHIC, HEALTHY, HORMONE, HUMAN, ILLUSTRATION, INTERNAL, KAULITZKI, MALE, MAN, METABOLISM, NO-ONE, NOBODY, NORMAL, ORGAN, SEBASTIAN, THREE, THYROID, TRANSPARENT,