UNSW Embryology

Beginnings, Growth and Development

© Dr Mark Hill (2006)

Acknowledgements

Carnegie stage 23

Facts: Week 8, 56 - 60 days, 27 - 31 mm

View: Lateral view. Amniotic membrane removed.

Identify: scalp vascular plexus, eylid, eye, nose, auricle of external ear, mouth, sholder, arm, elbow, wrist, toes separated, sole of foot, umbilical cord

Events

Ectoderm:

Mesoderm: heart prominence, ossification continues

Head: nose, eye, external acoustic meatus

Body:straightening of trunk, heart, liver, umbilical cord

Limb: upper limbs longer and bent at elbow, foot with separated digits, wrist, hand with separated digits

Events

Ectoderm:

Mesoderm: ossification continues

Head: eyelids, external ears, rounded head

Body: straightening of trunk, intestines herniated at umbilicus

Limbs: hands and feet turned inward

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

Next

Link to next page in this Practical 11 - Early Fetal (week 10)

Quick Movie Links

Movie of Growth through the Embryonic period (this shows a human embryo growing, all images are to scale)

Human Development (3 Mb, this is a large movie, images are not to scale)

Movie of Limb Growth(this shows development of the human arm from bud to paddle, to hand with arm)

Movie of Mouse Embryo Growth (this shows a mouse embryo growing)

Movie of Rotating Embryo(this shows an early embryo from all angles)

All Moviesthis shows many different ways of looking in at changes in different embryos.

UNSW Embryology ISBN: 0 7334 2321 3

UNSW CRICOS Provider Code No. 00098G