Carnegie stage 3: Difference between revisions

Revision as of 06:05, 25 October 2011

Introduction

The free-floating blastocyst has reached the uterine body still enclosed in the zone pellucida and "hatches" from this surrounding extracellular matrix. It is only after hatching that the blastocyst can attach to and then implant into the uterine wall.

Human Blastocyst "hatching" from zona pellucida (classified as Carnegie stage 3).

Blastocyst is too the right of image and zona pellucida is shown to the left of the image.

small opening in the zona pellucida through which the blastocyst is hatching.
flattened trophoblast cells forming the outer cell layer of the blastocyst.
inner cell mass shown in the centre of the image and on the left-hand wall of the blastocyst.
blastocoel forming a large fluid-filled space within the blastocyst.

Links: Week 1 | Blastocyst | Lecture | Practical Stage 4

Human blastocyst (day 5) still within zone pellucida.

Facts: Week 1, 4 - 5 days, size 0.1-0.2 mm

Features: zona pellucida, trophoblast shell, inner cell mass, blastoceol

Links: Lecture | Practical | Implantation | Week 1


Blastocyst Development Early development day 3 to 6	Blastocyst Contractions (day 5 to 6)	Blastocyst Hatching (day 5 to 6)

Carnegie Collection


58 cell blastocyst (day 4)	107 cell blastocyst (day 4.5)

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

Cite this page: Hill, M.A. (2024, April 18) Embryology Carnegie stage 3. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_3

What Links Here?

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 ==Introduction==
+The free-floating blastocyst has reached the uterine body still enclosed in the zone pellucida and  "hatches" from this surrounding extracellular matrix. It is only after hatching that the blastocyst can attach to and then implant into the uterine wall.
 {|
 | [[Image:CSt3.jpg]]
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 :'''Links:''' [[Lecture - Week 1 and 2 Development|Lecture]] | [[2011_Lab_2|Practical]] | [[Implantation]] | [[Week 1]]
+{|
+| width= 200px | [[File:Human-blastocyst-day-3-6-icon.jpg|120px|link=Movie_-_Blastocyst_Development]]
+| width= 200px | [[File:Human_blastocyst_day_5-6.jpg|120px|link=Movie_-_Blastocyst_Contractions]]
+| width= 200px | [[File:Human blastocyst hatching movie icon.jpg|120px|link=Movie - Blastocyst Hatching]]
+|-bgcolor="FAF5FF"
+| [[Movie_-_Blastocyst_Development|Blastocyst Development]]
+Early development day 3 to 6
+| [[Movie_-_Blastocyst_Contractions|Blastocyst Contractions]]
+(day 5 to 6)
+| [[Movie_-_Blastocyst_Hatching|Blastocyst Hatching]]
+(day 5 to 6)
+|}
 ==Carnegie Collection==