UNSW Embryology

Serial Sections

© Dr Mark Hill (2008)

Acknowledgements

Introduction

This page is an access point to the many images of sections through embryos at different stages of development.

Images include: Carnegie stage 13/14, stage 22, high power stage 22 and sagittal sections of an older female fetus.

Clicking on the tables below will open unlabelled images of that specific section. Levels shown on whole embryo are only approximate.

Stage 13/14 Embryo

	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

Stage 22 Embryo (Human)

	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

Stage 13/14 Embryo (Pig) Systems

Coelomic Cavity and Derivatives

Endocrine

Gastrointestinal Tract Development

Head and Neck (pharyngeal arches)

Heart Development | inflow | into aortic | arterial | venous

Musculoskeletal Systems

Nervous System

Neural Crest

Organs of Senses

Respiratory System

Skin, Hair and Nails

Urogenital

Placenta and Fetal Membranes

Stage 22 Embryo (Human) Systems

Coelomic Cavity and Derivatives

Endocrine

Gastrointestinal Tract Development

Head and Neck (pharyngeal arches)

Heart Development

Musculoskeletal Systems

Nervous System

Neural Crest

Organs of Senses

Respiratory System

Skin, Hair and Nails

Urogenital

Placenta and Fetal Membranes

Stage 22 Embryo (Human) High Power Images

A1 t/s head forebrain	A2 Developing Cortex	A3 t/s head at eye level	A4 Optic Nerve	A5 Optic Retina	A6 Optic Lens
A7 t/s head above mouth	B1 Trigeminal Ganglion	B2 Developing Pituitary	B3 t/s head at ear level	B4 Choroid Plexus	B5 Cochlear & Utricle	B6 Cochlear
B7 t/s upper neck	C1 Larynx	C2 t/s lower neck	C3 Thyroid	C4 Trachea & Oesophagus
C5 t/s upper chest	C6 Thymus	C7 t/s chest	D1 Lung	D2	D3 Foot
D4 t/s chest	D5 Heart valves	D6 Spinal Cord	D7 t/s heart	E1 Heart	E2 Heart Valves
E3 t/s abdomen	E4 Liver	E5 Liver	E6 t/s abdomen	E7 pyloroduodenal junction
F1 t/s peritoneum	F2 Pancreas	F3 Adrenal Gland	F4 t/s peritoneum	F5 Kidney	F6 Renal Corpuscle
F7 t/s peritoneum	G1 Mesonephros	G2 Aorta	G3 Testis	G4 Testis (hp)
G5 t/s pelvis	G6 Bladder, Ureters, Para & Mesonephric Ducts			G7 Bladder, Ureters, Para & Mesonephric Ducts (hp)

Sagittal Sections Embryo (Human)

A series of sagittal sections starting at the midline of the fetus. Click on the A-D to see specific sections.
Below each image is a selected high power image.

More Information...

	Unlabelled Images D C B A	Labelled Images D C B A
Also extracts for: Neural Images of the Head Region

About Sections

• The serial sections are showing only 2 specific stages of development, early (Carnegie stage 13/14) and late (Carnegie stage 22).
  • The 6mm Pig embryo is approximately day 42 Human and Carnegie stage 13/14.
  • The 27mm Human embryo is approximately day 56 and Carnegie stage 22.
• Levels indicated on images are only approximate.
• There are also grouped sections for Pig and Human to show how individual slices relate to adjacent levels above and below the selected level.
• The sagittal sections are from a late stage Human embryo.
• The original image sets from microfiche used in both the Medicine and Science Embryology Courses in the Department of Anatomy, University of New South Wales.

Serial Images History

The original principle of using serial sections on microfiche cards was developed by Dr M. Smith, Prof. C. Watson and the late Prof. I. Tork in the early 1980's. The original 27mm Human embryo microfiche images were developed by Dr M. Smith and the 6mm Pig Embryo microfiche images by Dr M. Smith and Prof. I. Tork.

UNSW Embryology ISBN: 978 0 7334 2436 6

UNSW CRICOS Provider Code No. 00098G