Steps of Embryogenesis

The first trimester of pregnancy lasts

• 3 months

• 8 weeks

• 34 weeks

• 3 weeks

Which of the following outlines the steps of embryogenesis in chronological order?

• Cleavage > Gastrulation > Neurulation > Organogenesis

• Gastrulation > Cleavage > Neurulation > Organogenesis

• Cleavage > Gastrulation > Organogenesis > Neurulation

• Gastrulation > Cleavage > Organogenesis > Neurulation

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The purpose of the Embryonic Stage of development is to...

• Increase embryo's size

• Lay the foundation for all organ systems

• Increase embryo's size and lay the foundation for all organ systems

• Prepare the embryo to enter the harsh outside environment

• Increase embryo's size and prepare embryo for outside environment

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Which part of the Blastocyst will grow into the embryo?

• Embryoblast

• Trophoblast

• Morula

• Zygote

• Blastocoele

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How does a morula differ from a blastocyst?

• A morula is a ball of 32-cells while a blastocyst consists of an internal ball of cells surrounded by perimeter cells.

• A blastocyst is a ball of 32-cells while a morula consists of an internal ball of cells surrounded by perimeter cells.

• A morula is a single cell while a blastocyst consists of a ball of cells.

• A blastocyst is a single cell while a morula consists of a ball of cells.

Which of the following implants itself into the endometrium during implantation?

• Blastocyst

• Morula

• Zygote

• Trophoblast

The process in which cells in the blastocyst rearrange themselves into three germ layers known as the ectoderm, mesoderm, and endoderm.

• Cleavage

• Gastrulation

• Neurulation

• Organogenesis

• Mitosis

The process of laying down the foundation for what will become the nervous system.

• Cleavage

• Gastrulation

• Neurulation

• Organogenesis

• Mitosis

The process of organ development from the germ layers.

• Cleavage

• Gastrulation

• Neurulation

• Organogenesis

• Mitosis

When does organogenesis occur during the Embryonic Period?

• Week 1

• Week 3

• Weeks 3 & 4

• Weeks 3 - 8

• Week 2

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