UNSW Embryology

Movie- Rotating 6mm Pig (stage 13/14)

© Dr Mark Hill (2004)

Acknowledgements

Introduction

A simple rotation of the 6mm embryo that can be stopped and started to see specific surface features. Look at the relative size and position of surface features and bulges on the embryo that reflect growth of internal structures. This stage of development is also shown in a series of "slices" (More? Stage 13/14 Embryo Serial Sections) which can also be viewed as a movie (More? Stage 13/14 Embryo Serial Section Movie).

External

Features:

• The pronounced curvature and the L/R symmetry of the whole embryo.
• The presence of short forelimb and hindlimb buds with no obvious hand or feet features.
• The position of the placenta/umbilical herniation, low and near the hindlimb buds.
• The 3 prominant pharyngeal arches, the upper (first) is divided into a maxillary (upper, smaller) and mandibular (lower, largest)component.
• The presence of large surface olefactory, optic placodes (quite lateral).
• The small auricular site.

Internal

Features:

• The curvatures of the CNS and the large 4th Ventricle space.
• The somite bulges visible paired either side of the developing spine running down to the end of the "tail"
• The 2 large bulges in the abdomen, the upper one is the Heart, the lower the Liver

Quicktime movie: Pig.mov (603 Kb) in new window.

Glossary of Terms

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

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: 0 7334 2321 3

UNSW CRICOS Provider Code No. 00098G