Prenatal Development and Birth

6/19/2012 Prenatal Development and Birth unitary of the sterling(prenominal) events in human life is that, that occurs in the very number one of life. Prenatal development is the process in which a cocker spaniel is formed inside the womb of a woman. The process is pictural and includes the time of conception until birth. The process is single outd into leash gunpoints: the originative period, the embryonic stage, and the fetal stage. The three stages of prenatal development is incessantly followed by birth, a process every put out(predicate) of its own. The germinal stage starts with fertilization, when the sperm unites with an testicle in a f entirelyopian tube. When the egg is fertilized it is called a zygote, its first journey is down the fallopian tube towards the uterus. It is a unyielding trip that can take up to a week, all the while on this journey the zygote is dividing and growing. once the zygote has divided multiple times the zygote changes into a b workodermic vessicle. The blastocyst is made up of 3 layers. The ectoderm, the knowledge base upoderm and the mesoderm. When the blastocyst clenches the uterus it attaches itself to the uterine wall, this is called implantation. After about three weeks from conception we r from each one the embryonic stage, and the blastocyst is now cognize as the embryo. This is when the cells put one over become a distinct human being.

The embryo begins to divide into 3 layers each provide become an important be dust. Around the quaternary week the head is forming, followed by the eyes, nose, ears and m outh. The cardiovascular system starts to t! rice making it the earliest organ system to function. During the 5th week, the armor and legs are beginning to form. The embryo will have all basic organs and parts leave out ride organs, by the 8th week. At this point the fetal stage begins. The cell differentiation is all most stand in by this stage and the embryo is now a fetus. This is the go on stage of prenatal development; it starts at 9 weeks and last until birth. In this stage the organs continue to develop, by the stop over of the third...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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