Embryonic Development is when the embryo is formed and develops.
It starts with the fertilization of a egg which after is called a zygote. The zygote goes through rapid divisions.
The scientific name for it is Embryogenesis.
3 Stages of Embryonic Development
Embryonic Development has 4 stages
Cleavage is the first stage of embryonic development.
In this stage the cell starts to divide. Each with the exact genes in the zygote. It is controlled by the mothers genes.
In the end of the process of Cleavage the zygote is now called a blastula.
5 The Different Stages of the Organism. 6 Patterning
This is the second phase.
During this phase the cells produced by Cleavage organize themselves in layers and masses.
Parts of the organism that develop
Front and the rear.
Back side and belly side.
Left and right side.
During this process three major germ layers are formed
By the end of this process the zygotes genes are expressed.
This is the third stage.
It starts to make specialized structures and has more functions.
The body now produces neurons skin cells muscle cells and etc.
The organized into tissues the tissues organize into organs and the organs into systems.
This is the last stage.
In this stage the organism goes through a period of growth.
New cells are formed and more extra cellular matrix.
9 The First Trimester
The first trimester is when the cell starts to divide.
The zygote begins to develop.
At the end of this trimester the
Head is round
Eyes are closed
Taste buds are forming
The internal organs move into the body cavity
Upper and lower limbs are formed.
10 The Second Trimester
In the second trimester the baby is becoming more developed. The baby develops more.
At the end of the trimester
The babys eyes are open.
The sex is determined.
The baby weighs 12.5 ounces.
Bones and muscles are growing steadily.
11 The Third Trimester
In the third trimester the baby is developing.
What is developed
Footprints and fingerprints are formed
Eyelids open and close
Brain development grows rapidly
The baby is born
12 The End
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