Embryology

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    Embryology

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    Embryology: How far should we go? Embryology is the study of embryos and their development. Throughout history, scientists and the public have been debating the question of how far should the study of manual fertilized embryos go? The law that scientists have followed for decades has been the 14 day rule, meaning that a research group is only allowed to study an embryo from fertilization to Day 14, then they have to stop. This guideline is to be followed because after the 14 days, the embryo now begins to develop into a "life". I believe that the 14 day rule is a fit law that should be followed. However, I do believe that human embryo research is important and that the embryo should be allowed to be studied more in certain circumstances. The 14 day rule makes sense to scientists and researches for many reasons. LeRoy Walters, a Director of the Kennedy Institute of Ethics and has " published widely on genetic ethics, research ethics... and reviews human gene therapy protocols" ("LeRoy Walters - Intensive Bioethics Course"), was a witness for the Ethics Board when it was discussing about ethical guidelines for embryos. One reason Walters said that 14 days…

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    Embryonic development is the changes an embryo undergoes as it grows toward a developed organism. In early embryonic development, the first stage begins with fertilization, when the female egg fuses with the male sperm to create a zygote (Biology.OpenStax.1753). After a zygote is formed, cleavage (unusually large cell) converts the zygote to a multicellular organism (embryo) by rapidly dividing a single cell (each the same size) to form a hollow ball of cells, called a blastula. The next stage…

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    organisms: Zebrafish, Xenopus and chick embryos require specific genes in early steps of neural crest development. Mice however, are dissimilar as knockouts of Fgf8, Pax3, Pax7, Notch1 genes do not exhibit a failure of neural crest cell induction as they would do in the other model organisms. [12] Discussion The phylotypic stage is the idea that there is one time point in which the embryos of a given species look morphologically more similar to each other than at any other stage of development.…

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    There are five different stages of development that I have gone through. The stages are prenatal, infancy and toddlerhood, early childhood, middle childhood, and adolescence. The stage of development that I am currently in is early adulthood. I am still at the beginning of early adulthood. Adolescence also includes three stages within it, early adolescence, middle adolescence, and late adolescence. Prenatal development is the period from conception to birth. When my mom was pregnant with me…

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    The overall purpose of the Stages of Embryonic Development of Zebrafish experiment was to provide in-depth documentation on the different stages that a zebrafish undergoes throughout its growth as an embryo. The main idea of the article is to propose the embryonic development of zebrafish in an efficient and intuitive manner known as stages. In this case Kimmel et al didn’t look to resolve any questions, but sought to improve the current portrayal of the zebrafish embryonic development. In the…

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    The pregnancy is dated from the first day of a mothers last period. So in the first few weeks of the pregnancy, the mothers body will prepare for ovulation as it normally would. Meaning the mother isn 't actually pregnant in these first few weeks. After roughly two weeks after the start of the mothers last period, she will ovulate. Three weeks from the last period the fertilised egg will move through the fallopian tube and towards the womb. The egg, which to begin with is a singular cell, will…

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    While implantation occurs, blastocyst is being concerted into gastrula, in which three germ layers from and embryonic membranes develop. The beginning is when the inner cell mass differs into two layers which are the epiblast and the hypoblast. Both of these cells form four embryonic membranes which are the amnion, the yolk sac, allantois, the umbilical cord, and the chorion. The amnion provides a buoyant environment which protects the embryo from physical trauma and helps maintain a constant…

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    The three phases of early embryonic are: cleavage, gastrulation, and organogenesis. First, cleavage is the phase “in which a zygote is repeatedly divided into smaller individual cells through cell division” (Krogh, 2011, p. 619). During this phase the cells will become smaller because usual growth will not occur during cell division. As a result, a tightly packed ball of early embryonic cells called a morula will develop. After experiencing additional changes the cells will arrange themselves…

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    The opposing side may argue that Lee is in close proximity with the patients. When Lee, the reproductive endocrinologist, and the couple have conversations about the final call of the in vitro fertilization process, this puts Lee in a position that would constitute a close customer relationship. Lee has personal contact through the in-person communications. Lee has worked for the University for five years. While employed for the University she acquired her Ph.D. in embryology. Lee’s knowledge…

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    organisms derived or originated from two different ancestral organisms, but grew up in similar environments causing them both to develop similar structures to meet the needs of survival in said environment (Comparative Anatomy)(Tracing Back Traits). The third thing scientists study to find evidence of evolution is Embryology. Embryology can literally be broken down to the study of embryos(Embryology). Embryos are one of the earliest stages of development in any organism, prior to being born. No…

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