TY - CHAP M1 - Book, Section TI - The Adrenal Glands A1 - Wells, Robert G. Y1 - 2015 N1 - T2 - Diagnostic Imaging of Infants and Children AB - The adrenal cortex is of mesodermal origin, whereas the medulla forms from ectodermal elements. The primitive adrenal cortex arises from coelomic mesoderm around the fifth week of gestation. Additional cells migrate to join this initial aggregation at approximately 7 weeks. This early adrenal cortex separates from the peritoneal mesothelium by the end of the eighth week. Adrenocortical differentiation continues after birth, resulting in completed formation of the zona glomerulosa, zona fasciculi, and zona reticularis by about the age of 3 years. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accesspediatrics.mhmedical.com/content.aspx?aid=1148952486 ER -