Placenta - Stage 13

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Historic Embryology - Placenta 
1883 Embryonic Membranes | 1907 Development Atlas | 1909 | 1910 Textbook | 1917 Textbook | 1921 Textbook | 1921 Foetal Membranes |1921 human | 1921 Pig implantation | 1923 Placenta Review | 1939 umbilical cord | 1943 human and monkey | 1944 chorionic villus and decidua parietalis | 1946 placenta ageing | 1960 monkey | 1972 Placental circulation | Historic Disclaimer

Serial Labeled Images

Carnegie Stage 13 Embryo the outer dark line in the sections is the amniotic membrane and the fluid-filled space between the membrane and the embryo is the amniotic sac filled with amniotic fluid.

Clicking the section image or label will open a full page view (use the browser back button to return here).

Table Legend

Features: identifies, reading in a left to right sequence, major anatomical structures visible in the specific embryo section.

  • Bullet points relate to placental structures.
  • R = right, L = left.


Stage 13 image 075.jpg

D5L

Features: dorsal body wall, spinal cord, dorsal aorta, posterior cardinal veins, stomach, liver, heart ventricles, and ventral body wall.
  • Liver contains - hepatic sinusoids, ductus venosus and heptocardiac channel.
  • The heptocardiac channels are from the R and L vitelline veins.
Stage 13 image 076.jpg

D6L

Features: dorsal body wall, spinal cord, upper limb buds, dorsal aorta, posterior cardinal veins, stomach, liver, heart ventricle, and ventral body wall.
  • Liver contains - hepatic sinusoids, gall bladder and heptocardiac channels.
  • The heptocardiac channels are from the R and L vitelline veins.
Stage 13 image 077.jpg

D7L

Features: dorsal body wall, spinal cord, upper limb buds, dorsal aorta fusing, posterior cardinal veins, duodenum, liver, heart ventricle, and ventral body wall.
  • left placental (umbilical) vein.
  • right placental (umbilical) vein entering portal vein.
Stage 13 image 078.jpg

E1L

Features: dorsal body wall, spinal cord, upper limb buds, dorsal aorta, posterior cardinal veins, mesonephros, duodenum, liver, transverse septum, and ventral body wall.
  • R and L placental (umbilical) veins.
  • R vitelline vein.
Stage 13 image 079.jpg

E2L

Features: dorsal body wall, spinal cord, upper limb buds, dorsal aorta, posterior cardinal veins, mesonephros, intestine, umbilicus, ventral body wall and lower end of embryo with cloaca.
  • R and L placental (umbilical) veins.
  • R vitelline vein.
Stage 13 image 080.jpg

E3L

Features: dorsal body wall, spinal cord, upper limb buds, dorsal aorta, mesonephros, intestine, umbilicus, ventral body wall and lower end of embryo with cloaca.
  • R and L placental (umbilical) veins embedded in ventral body wall at umbilicus.
Stage 13 image 081.jpg

E4L

Stage 13 image 082.jpg

E5L

Stage 13 image 083.jpg

E6L

Stage 13 image 084.jpg

E7L

Stage 13 image 085.jpg

F1L

Stage 13 image 086.jpg

F2L

Stage 13 image 087.jpg

F3L

Stage 13 image 088.jpg

F4L

Stage 13 image 089.jpg
F5L
Stage 13 image 090.jpg

F6L

Stage 13 image 091.jpg

F7L

Stage 13 image 097.jpg

G6L

Stage 13 image 098.jpg

G7L

All Sections

About Stage 13 Embryo Sections - This image is from a serial section of a 6mm CRL pig embryo with some features of the Stage 14 embryo. This embryo is approximately equal to the day 42 human embryo. Use these serial images to identify internal features and relationships that exist within the embryo at this stage. Then compare these images with the later features of the Carnegie stage 22 human embryo.

Links: Carnegie stage 13 - serial sections | Carnegie stage 13 | Embryo Serial Sections
Stage 13 image 099-icon.jpg
Stage 13 Serial unlabeled images

A1   A2   A3   A4   A5   A6   A7

B1   B2   B3   B4   B5   B6   B7

C1   C2   C3   C4   C5   C6   C7

D1   D2   D3   D4   D5   D6   D7

E1   E2   E3   E4   E5   E6   E7

F1   F2   F3   F4   F5   F6   F7

G1   G2   G3   G4   G5   G6   G7

Embryo Stage 13 Serial labeled images

A1L  A2L  A3L  A4L  A5L  A6L  A7L

B1L  B2L  B3L  B4L  B5L  B6L  B7L

C1L  C2L  C3L  C4L  C5L  C6L  C7L

D1L  D2L  D3L  D4L  D5L  D6L  D7L

E1L  E2L  E3L  E4L  E5L  E6L  E7L

F1L  F2L  F3L  F4L  F5L  F6L  F7L

G1L  G2L  G3L  G4L  G5L  G6L  G7L



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Cite this page: Hill, M.A. 2017 Embryology Placenta - Stage 13. Retrieved November 18, 2017, from https://embryology.med.unsw.edu.au/embryology/index.php/Placenta_-_Stage_13

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© Dr Mark Hill 2017, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G