part_of part of part of endocrine system kidney hematopoietic system head kidney kidney marrow anterior kidney GOC:cvs The zebrafish head kidney consists of fused bilateral lobes located in the anterior part of the kidney. It is analogous to the mammalian bone marrow and the primary site of definitive hematopoiesis. ORCiD:0000-0002-2244-7917 zebrafish_anatomy TAO:0000669 PMID:15378083 zebrafish component