Carnegie stage 3: Difference between revisions
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==Introduction== | ==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. | {| | ||
| [[File:Human embryo day 5 label.jpg]] | |||
Human blastocyst (day 5) still within zone pellucida. | |||
| 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. | |||
'''Facts:''' Week 1, 4 - 5 days, size 0.1-0.2 mm | |||
'''Features:''' [[zona pellucida]], [[T#trophoblast shell|trophoblast shell]], [[I#inner cell mass|inner cell mass]], [[B#blastoceol|blastoceol]] | |||
:'''Links:''' [[Week 1]] | [[Blastocyst]] | [[Lecture - Week 1 and 2 Development|Lecture]] | [[2011_Lab_2|Practical]] [[Carnegie_stage_4|Stage 4]] | |||
[[File:Human embryo day 5 label2.jpg]] [[File:Human embryo day 5.jpg|Stage 3 Day 5]] | |||
==Blastocyst Hatching== | |||
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* inner cell mass shown in the centre of the image and on the left-hand wall 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. | * blastocoel forming a large fluid-filled space within the blastocyst. | ||
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Revision as of 06:07, 25 October 2011
Introduction
Human blastocyst (day 5) still within zone pellucida. |
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.
Facts: Week 1, 4 - 5 days, size 0.1-0.2 mm Features: zona pellucida, trophoblast shell, inner cell mass, blastoceol
Blastocyst Hatching
Carnegie Collection
Cite this page: Hill, M.A. (2024, May 1) Embryology Carnegie stage 3. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Carnegie_stage_3
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