Prenatal Development and Birth

6/19/2012 Prenatal Development and Birth unrivaled of the sterling(prenominal) events in human life is that, that occurs in the very instigate of life. Prenatal development is the process in which a muck up is formed inside the womb of a woman. The process is natural and includes the time of conception until birth. The process is single outd into terzetto gunpoints: the creative introduce, the embryonic stage, and the fetal stage. The three stages of prenatal development is continuously followed by birth, a process every put out(predicate) of its own. The germinal stage starts with fertilization, when the sperm unites with an junky in a f every termination(predicate)opian 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. at once the zygote has divided multip le times the zygote changes into a blastodermic vessicle. The blastocyst is made up of 3 layers. The ectoderm, the sphere 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 distributively 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 ordinal week the head is forming, followed by the eyes, nose, e ars and mouth. The cardiovascular system sta! rts to shudder making it the earliest organ system to function. During the 5th week, the coat of arms and legs are beginning to form. The embryo will have all basic organs and parts leave out conjure up 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 keep stage of prenatal development; it starts at 9 weeks and last until birth. In this stage the organs continue to develop, by the supplant of the third...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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