A blastocyst is about 2 weeks old. Implantation is important at this stagebecause theOOcells need an anchored place to divideQ 9 of 15the embryo develops sex characteristics using cells from the implantwallneural tube forms from the wall of the implantationcells need a means of receiving nutrition

Early human embryos go through the blastocyst stage, which is characterised by a spherical structure…

Answered: A blastocyst is about 2 weeks old.…

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter42: Animal Development

Section: Chapter Questions

Problem 15SQ

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A blastocyst is about 2 weeks old. Implantation is important at this stage
because the
O
O
cells need an anchored place to divide
Q 9 of 15
the embryo develops sex characteristics using cells from the implant
wall
neural tube forms from the wall of the implantation
cells need a means of receiving nutrition

Expert Solution

Introduction:

Early human embryos go through the blastocyst stage, which is characterised by a spherical structure made up of an inner cell mass surrounded by a layer of trophoblast cells.
This stage occurs about 5 days after fertilisation and is when the embryo implants into the uterine wall to begin pregnancy.
The trophoblast cells will develop into the placenta, and the inner cell mass will eventually differentiate into the embryonic disc, which will give rise to the foetus.

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