Renal System - Carnegie Stage 13

From Embryology

Introduction

Stage13-GIT-icon.jpg Movies - Embryo Carnegie stage 13 - This embryo animation rotates and show the relative position of internal renal system structures at about the middle of embryonic development. Compare these with the later stage 22 embryo.

The movie is based upon reconstruction of serial slice images.

Renal and Gastrointestinal


Renal Links: renal | Lecture - Renal | Lecture Movie | urinary bladder | Stage 13 | Stage 22 | Fetal | Renal Movies | Stage 22 Movie | renal histology | renal abnormalities | Molecular | Category:Renal
Historic Embryology - Renal  
1907 Urogenital images | 1911 Cloaca | 1921 Urogenital Development | 1915 Renal Artery | 1917 Urogenital System | 1925 Horseshoe Kidney | 1926 Embryo 22 Somites | 1930 Mesonephros 10 to 12 weeks | 1931 Horseshoe Kidney | 1932 Renal Absence | 1939 Ureteric Bud Agenesis | 1943 Renal Position

Stage 13 Annotated

Stage 13 image 097.jpg Stage 13 image 098.jpg Cranial and caudal extent of mesonephros (the mesonephros is never so well-developed in equivalent human embryos). Youngest mesonephric tubules at caudal end. Mesonephric duct in G7.
G6L G7L
Stage 13 image 077.jpg Stage 13 image 078.jpg Glomeruli. In E1, note form of urogenital ridge and urogenital "mesentery".

In the urogenital ridge, identify the subcardinal vein and the mesonephric (Wolffian) duct. Dorsal aortae fuse.

D7L E1L
Stage 13 image 081.jpg Stage 13 image 082.jpg E4 Afferent glomerular arteriole from dorsal aorta. In urogenital ridge, note medial location of glomeruli and lateral location of convoluted tubules and mesonephric duct.

Mesonephric duct. Dark mass of mesenchyme (medial) is the metanephrogenic cap = precursor of the definitive kidney. Note lateral extensions of urogenital sinus - the terminal mesonephric ducts. The two crests between the rectum and each mesonephric duct are still the lateral extensions of the urorectal septum. Near caudal limit of intraembryonic coleom. Umbilical artery sweeps lateral to the coelom, which in turn, lies lateral to the mesonephric duct. E5-F4: Note further lateral displacement of mesonephric duct in urogenital ridge. Note medial thickening of coelomic epithelium of the UG ridge (gonad precursor - prominent in F2).

E4L E5L


Mesonephros and Mesonephric Duct

D7-G4: Section passes dorsally to the mesonephros. Return to G4 and then follow the caudal route of the mesonephric duct into the sacral region.


Stage 13 image 077.jpg
D7L
Stage 13 image 078.jpg Stage 13 image 079.jpg Stage 13 image 080.jpg Stage 13 image 081.jpg Stage 13 image 082.jpg Stage 13 image 083.jpg Stage 13 image 084.jpg
E1L E2L E3L E4L E5L E6L E7L
Stage 13 image 085.jpg Stage 13 image 086.jpg Stage 13 image 087.jpg Stage 13 image 088.jpg Stage 13 image 089.jpg Stage 13 image 090.jpg Stage 13 image 091.jpg
F1L F2L F3L F4L F5L F6L F7L
Stage 13 image 092.jpg Stage 13 image 093.jpg Stage 13 image 094.jpg Stage 13 image 095.jpg
G1L G2L G3L G4L


Caudal End of Embryo

Stage 13 image 084.jpg

E7L

E7: Most caudal extent of mesonephros, with mesonephric ducts (lateral). Rectum and urogenital sinus with urorectal septum in between. Umbilical artery (L side). note shape of Intraembryonic coelom on L. Site of caudal attachment of connecting stalk to body wall.
Stage 13 image 083.jpg

E6L

E6: Lateral branch of dorsal aorta forming common iliac artery. Umbilical artery. Lower limb bud (damaged on R side). Junction of rectum and urogenital sinus. Urorectal septum continues laterally as two crests. Detached connecting stalk.
Stage 13 image 082.jpg

E5L

E5: Near caudal limit of intraembryonic coleom. Umbilical artery sweeps lateral to the coelom, which in turn, lies lateral to the mesonephric duct.
Stage 13 image 081.jpg

E4L

E4: Mesonephric duct. Dark mass of mesenchyme (medial) is the metanephrogenic cap = precursor of the definitive kidney. Note lateral extensions of urogenital sinus - the terminal mesonephric ducts. The two crests between the rectum and each mesonephric duct are still the lateral extensions of the urorectal septum.
Stage 13 image 080.jpg

E3L

Stage 13 image 079.jpg

E2L

E3,E2: Mesonephric ducts joining to urogenital sinus. Urorectal septum. Metanephrogenic caps. Cloacal membrane

Stage 13

Stage 13 serial labeled images
Stage 13 image 077.jpg
Stage 13 image 078.jpg Stage 13 image 079.jpg Stage 13 image 080.jpg Stage 13 image 081.jpg Stage 13 image 082.jpg Stage 13 image 083.jpg Stage 13 image 084.jpg
E1L E2L E3L E4L E5L E6L E7L
Stage 13 image 085.jpg Stage 13 image 086.jpg Stage 13 image 087.jpg Stage 13 image 088.jpg Stage 13 image 089.jpg Stage 13 image 090.jpg Stage 13 image 091.jpg
F1L F2L F3L F4L F5L F6L F7L
Stage 13 image 092.jpg Stage 13 image 093.jpg Stage 13 image 094.jpg Stage 13 image 095.jpg Stage 13 image 096.jpg Stage 13 image 097.jpg Stage 13 image 098.jpg
G1L G2L G3L G4L G5L G6L G7L


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Cite this page: Hill, M.A. (2018, December 11) Embryology Renal System - Carnegie Stage 13. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Renal_System_-_Carnegie_Stage_13

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© Dr Mark Hill 2018, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G