develops from OBO_REL:part_of (UNDECLARED) head kidney interrenal gland An epithelial structure consisting of steroid producing cells interposed with chromaffin cells embedded within the head kidney. The interrenal gland is thought to be the equivalent of the mammalian adrenal cortex in zebrafish. Hsu et al. 2003. TAO:0001345 teleost_anatomy interrenal primordium