Carnegie stage 21: Difference between revisions

Revision as of 12:42, 4 September 2009

Introduction

Facts

Week 8, 53 - 54 days, 22 - 24 mm

Events

Ectoderm: sensory placodes, nasal pits moved ventrally, fourth ventricle of brain

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 plate with digital rays begin to separate, wrist, hand plate with webbed digits

Features

scalp vascular plexus, eylid, eye, nose, auricle of external ear, arm, elbow, wrist, knee, notch between digital rays, umbilical cord

Identify: straightening of trunk, pigmented eye, eyelid, nose, external acoustic meatus, scalp vascular plexus, webbed digits, liver prominance, thigh, ankle, foot plate, umbilical cord

Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline

Kyoto Collection

View: This is a dorsolateral view of embryo. Amniotic membrane removed.

Image source: Embryology page Created: 19.03.1999

Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline

Image source: The Kyoto Collection images are reproduced with the permission of Prof. Kohei Shiota and Prof. Shigehito Yamada, Anatomy and Developmental Biology, Kyoto University Graduate School of Medicine, Kyoto, Japan for educational purposes only and cannot be reproduced electronically or in writing without permission.

Cite this page: Hill, M.A. (2024, April 18) Embryology Carnegie stage 21. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_21

What Links Here?

@@ Line 1: / Line 1: @@
-'''Facts:''' Week 8, 53 - 54 days, 22 - 24 mm
+== Introduction ==
-'''View:''' Lateral view. Amniotic membrane removed.
+===Facts===
-'''Features:''' scalp vascular plexus, eylid, eye, nose, auricle of external ear, arm, elbow, wrist, knee, notch between digital rays, umbilical cord
+Week 8, 53 - 54 days, 22 - 24 mm
-'''Identify:''' straightening of trunk, pigmented eye, eyelid, nose, external acoustic meatus, scalp vascular plexus, webbed digits, liver prominance, thigh, ankle, foot plate, umbilical cord
+===Events===
-Events
 Ectoderm: sensory placodes, nasal pits moved ventrally, fourth ventricle of brain
@@ Line 19: / Line 18: @@
 Limb: upper limbs longer and bent at elbow, foot plate with digital rays begin to separate, wrist, hand plate with webbed digits
-Image source: [http://embryology.med.unsw.edu.au/wwwhuman/Stages/stage21.htm Embryology page Created: 19.03.1999]
+===Features===
+scalp vascular plexus, eylid, eye, nose, auricle of external ear, arm, elbow, wrist, knee, notch between digital rays, umbilical cord
+'''Identify:''' straightening of trunk, pigmented eye, eyelid, nose, external acoustic meatus, scalp vascular plexus, webbed digits, liver prominance, thigh, ankle, foot plate, umbilical cord
-== Introduction ==
-===Facts===
-===Events===
-===Features===
 {{Template:Carnegie_stages}}
-== Bright Field ==
 ==Kyoto Collection==
@@ Line 48: / Line 32: @@
 View: This is a dorsolateral view of embryo. Amniotic membrane removed.
-Image source: [http://embryology.med.unsw.edu.au/wwwhuman/Stages/stage15.htm Embryology page Created: 19.03.1999]
+Image source: [http://embryology.med.unsw.edu.au/wwwhuman/Stages/stage21.htm Embryology page Created: 19.03.1999]
 {{Template:Carnegie_stages}}