The Reproductive System Laszlo Vass‚ Ed.D. Version 42-0025-02-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information
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young plant‚ the embryo. The seed coat may be made of inner tegmen and outer testa. On the seed coat a scar (hilum) is present which shows the place of attachment of a seed in the fruit is present. At one end of the hilum is the micropyle. Through micropyle the seed absorbs water during the process of germination. The embryo consists of epicotyl‚one or two seed leaves called cotyledons‚ and a hypocotyle. The portion of the embryo above the point of attachment of cotyledons to embryo axis‚ and below
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Embryo transfer is the process of taking fertilized embryos from one animal and inserting them into another. This is very useful today in cattle‚ because now it is economically feasible and it allows the producer a greater number of offspring from one cow with desirable traits. The process starts normally by artificially inseminating the cow. Exactly seven days later‚ the uterus is flushed‚ and the embryos and ova. Next‚ the embryos will be isolated. The embryos are then inserted into the recipient
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controversy surrounding it. The factors that we need to consider mainly fall on the status of the human embryo. Where does life begin? Most Christians believe that life begins upon conception. Doctors fertilize more than one egg‚ to keep a surplus stock of embryos for future use‚ is even this ethical? What would happen if one of those embryos died? Embryonic stem cells are taken from human embryos. The majority of these stem cells develop from eggs that have
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stem cell research is: either the embryo is a human being or it’s not a human being‚ a person’s belief can help alter their decision on being for or against the research‚ cloning could be the answer to saving a life‚ and the potential the embryonic research can have will make a big impact on the world. To say that an embryo is or is not a human depends on the person and the concept they have on when a life is actually started. Many say that it starts at the embryo‚ where others debate that it starts
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According to embryology‚ all vertebrate embryos follow a common developmental path due to their common ancestry. All have a set of very similar genes that define their basic body plan. As they grow‚ the differences that will distinguish the embryos as adults become more and more apparent. The study of this development can yield insights into the process of evolution. This branch of embryology that compares and contrasts embryos from different species is called Comparative Embryology
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Bibliography: The Colombia Electronic Encyclopedia‚ 6th Ed. Copyright 2012 Koyabayashi‚ N. (2004). Effects of Heavy Metals on Sea Urchin Embryo Development. Retrieved October 5‚ 2013‚ from www.ncbi.nlm.nih.gov/pubmed/1508173 Ghorani. V. (2013). The Effects of Lead Toxicity on embryonic development and Early Larval Growth. Retrieved October 5‚ 2013‚ from www.nopr.niscair.res.in Dermeche‚
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after forming‚ cells division occurs rapidly. The rapid cell division is called cleavage. During cleavage tiny cells move through the uterine tubes during the time of implantation cells in the interface of the blastocyst. The cell surrounding the embryo is called the placenta this organ attaches
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Michael Esposito May 10‚ 2015 Brittany Baker Nutritional Needs Ad Life Stages Embryo 2-6 weeks the embryonic stage of development‚ from 2 to 8 weeks after fertilization‚ cells differentiate and arrange themselves in the proper locations to form the major organ systems. The embryo shown here is about 5 to 6 weeks old and less than 3 cm long. The organ systems and extern body structures are not fully developed. Fetal period 9
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presumptive belly skin region of another gastrula‚ it not only continued to be blastopore lip‚ but also initiated gastrulation and embryogenesis in the surrounding tissue (Figure 10.20). Two conjoined embryos were formed instead of one! In these experiments‚ Spemann and Mangold used differently pigmented embryos from two newt species: the darkly pigmented Triturus taeniatus and the nonpigmented Triturus cristatus. So when Spemann and Mangold prepared these transplants‚ they were able to readily identify
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