K12 Week 2
Week 2
In the second week of development the dividing zygote forms a solid ball of cells and is now called a blastocyst.
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This movie shows human development between day 3 and day 6 after fertilization.
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- The cells on the surface of the ball will not form part of the embryo and will go on to make the placenta and membranes that surround the embryo.
- The cells on the inside form a small clump beside a fluid filled space. This small clump of cells (embryoblast) will form all the parts of the embryo.
width=250px|height=240px|controller=true|autoplay=false</qt> | This movie shows the process of implantation that occurs during most of week 2 of human development. |
Question: You start as a single cell, how many cells are you now?
Words Used
blastocyst - the name given to all the new cells formed from the first cell (the zygote).
implanting - this means to burrow into the uterus wall.
Cite this page: Hill, M.A. (2024, April 24) Embryology K12 Week 2. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/K12_Week_2
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G