Kidney non-tumor

Authors: Nikhil Sangle, M.D. (see Authors page)

Revised: 8 July 2016, last major update March 2012

Copyright: (c) 2003-2016,, Inc.

PubMed search: Embryology[title] kidney
Cite this page: Embryology. website. Accessed April 27th, 2017.
Definition / General
  • Metanephric blastema: forms glomerulus, proximal convoluted tubules, loops of Henle, distal convoluted tubules and connective tissue of renal interstitium
  • Ureteric bud: forms cortical and medullary collecting tubules and medullary collecting ducts

  • Stages of kidney development:
    • Pronephros (based on Wolffian duct, kidneys non-functional)
    • Mesonephros (appear at week 4, form nephron-like tubules but degenerate)
    • Metanephros (form at week 5, function by week 11)
Gross Images

Images hosted on other servers:

Fetal kidneys at 25 weeks gestation

Infant kidney with fetal lobulations

Micro Images

Images hosted on PathOut server:

Contributed by Dr. Grigory Demyashkin, I. M. Sechenov First Moscow State Medical University (Russia) - 6-8 week embryo:

Left: metanephros; right: adrenal gland medulla

Left, above: metanephros; center: colon; right from top: pancreas

Left: small intestine; bottom: stomach; center: gonad and kidney primary (mesonephros); right: symphysis

Final kidney (metanephros), renal corpuscle

Final kidney (metanephros), renal corpuscle, collecting ducts

Left: metanephros; right: adrenal gland medulla

Final kidney (metanephros)

Left, above: final kidney (metanephros); lower left: liver; center: gonad & kidney primary (mesonephros); right: symphysis

Final kidney (metanephros)

Center: adrenal gland, medulla & final kidney (metanephros)

Additional References