UNSW Embryology

Human Embryo Resources

© Dr Mark Hill (2008)

Acknowledgements

Introduction

This page is a link to the many Human resources available in the UNSW Embryology program. Beneath each link is a brief description of the page/s content.

Resource Descriptions

Notes

For those interested in all aspects of Embryology there are the 2 sets of Notes. These notes do not currently relate directly to any specific course requirements.

1. Early Development 1 and Early Development 2: early weeks 1, 2, 3, 4 of development, population statistics, normal and abnormal, molecular, genetics, health issues, law and ethics.

2. Systematic Embryology covers: respiratory, cardiac, musculoskeletal, neural, gastrointestinal, urogenital systems. In each system notes; page 1 is an introduction and overview, page 2 covers developmental abnormalities, page 3 has carnegie stage 13/14 (pig), page 4 has carnegie stage 22 (human) serial sections, page 5 has selected high power images of the system and a list of relevant histological slides, and there is a separate WWW Links page.

Kyoto Human Series

• A Series of human embryos from the Kyoto collection that show specific Carnegie stages from (stage 11 to 23) of human embryo development. Note that many species can be categorized by this staging technique. There is a similar historic collection of human embryos at the Carnegie Institute, Washington.

Human Menstrual Cycle

• A brief overview containing some images.

Low Power Serial Sections

• These are the images from the Low Power 27mm Human (approx carnegie stage22) series.
• This is a single stage of development not a sequence.
• Images are available in 3 formats: Unlabelled, Labelled and Tutorial.
• Selected from this series are groups and system sets of images to help with spatial relationships within the embryo.

Selected High Power Sections

• These are the images from the 27mm Human (approx carnegie stage22) series showing selected regions at a higher magnification.
• The images are available in 3 formats: Unlabelled, Labelled and Tutorial.
• A Low Power image showing the selected region is generally shown first, followed by 1 to 3 High Power images from that section.

Human Systems

• This is an initial set of 27mm Human Embryo regions that have been grouped together to show systems through the serial sequence of images. A later version will contain more systems and information.

Body Regions

• Head & Neck This page shows the Sections grouped in small sets of 3-4 images that relate to the head and neck. The images are shown offset from each other so that changes in structure and spatial relationships can be seen. Note that there are also links to each individual labelled image.Head & Neck shows a table which links to all images in the 27mm Human Set that relate to the Head and Neck Region.
• Body Part 1 Part 2 Part 3This page shows the Sections grouped in small sets of 3-4 images that relate to the body. The images are shown offset from each other so that changes in structure and spatial relationships can be seen. Note that there are also links to each individual labelled image. Body

Human Sagittal Sections

• A series of Sagittal sections through the whole human embryo and a selected region of the embryo. Images are shown as unlabelled and some pages with labels.

Carnegie stage 22 Embryo Sections

The Carnegie stage 22 Human Embryo is 27mm in size and approximately equal to day 54 - 56 of development. Clicking on the table below will open a specific serial section image from the stage 22 human embryo.

For students following Anatomy Department Lab Handbooks the Serial Series Homepage links to just the serial sections described in the course notes.

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

Human Systems (st22)

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

Human Movies

Carnegie Stages

Unlabelled Stage 22 Serial Sections

Labelled Stage 22 Serial Sections

Movies Homepage

Carnegie stage 22 Embryo High Power Sections

Clicking on the table below will open a specific high power image from the stage 22 human embryo. These images can be used to look in detail at specific structures within the embryo at this stage.

High Power (st22)
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

Carnegie stage 22 Embryo High Power Sections

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)

10 Week 40mm Fetus

This page is a link to images from a 10 week female fetus approximately 40 mm in size.

This stage of development is after the embryonic period (up to week 8) but still only 2 weeks into early fetal development.

The fetal period is a time of extensive growth in size and mass as well as differentiation of organ systems established in the embryonic period. In particular, the brain continues to grow and develop, the respiratory system differentiates, the urogenital system further differentiates between male/female, endocrine and gastrointestinal tract begins to function.

There are 4 sections taken in the parasagittal and sagittal plane (moving from the right at Plane A towards the midline at Plane D). Click on the small images (or the text below) to open the linked large image pages.

10 Week Plane A | 10 Week Plane B | 10 Week Plane C | 10 Week Plane D

Quick Links

Development Notes ----------------- Menstrual Cycle Week 1 Week 2 Week 3 Week 4 Placenta Serial Images Genes/DNA Molecular Dev Abnormal Dev Postnatal Dev Notes Index

System Notes ----------------- Heart/Cardiovascular Respiratory Coelomic cavity Gastrointestinal Tract Head and Neck Neural Neural Crest Eye Ear Nose Endocrine Urogenital Musculoskeletal Integumentary

Movies ----------------- Embryo Growth Ultrasound Week 1 Week 2 Week 3 Week 4 Stage 13/14 Stage 22 Neural Head and Neck Heart Vasculature Gastrointestinal Urogenital Other Embryos Larsen Internet

Other Embryos ----------------- Chicken Fly Frog Mouse Rabbit Rat Worm Zebrafish Guinea Pig

UNSW Embryology ISBN: 978 0 7334 2609 4

UNSW CRICOS Provider Code No. 00098G