and an egg cell into the diploid cell being zygote. The union can either be an external fertilization or an internal fertilization. This essay will focus on the internal fertilization found in mammals‚ and more specific‚ in humans. The first part will consider human anatomy of both the female and male sexual reproductive systems‚ and then follows a description of the biological processes which take places after ejaculation and the forming of a zygote. In humans both females and males are equipped
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Shakeeta Morgan For life to have an on-going process‚ there must be the process of creating new life. This process is called reproduction. Human beings reproduce in much the same way as other mammals. There is need for both male and female to be involved in the human reproductive process. The Female Reproductive System The female reproductive system consists of the fallopian tube‚ ovum‚ovary‚ uterus‚ cervix and vagina. Ovary This is the name for the sex gland that is similar in function to
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More on ¡¥The Matrix¡¦ There are two kinds of people in this world: One who have seen the movie ¡¥The Matrix¡¦ and its sequels and the other kind who haven¡¦t. Although the movie derives heavily from Vedantic and Buddhist philosophies‚ never before the concept of ¡¥Virtual World¡¦ or ¡¥Mithya Jagat¡¦ so beautifully picturised. Everyone now believes that the Matrix does exist and Indians have been knowing this since ancient times in the form of ¡¥Maya¡¦. Whether it is controlled by machines or
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Anatomy of the Male Reproductive System Scrotum The scrotum is a sac-like organ made of skin and muscles that houses the testes. It is located inferior to the penis in the pubic region. The scrotum is made up of 2 side-by-side pouches with a testis located in each pouch. The smooth muscles that make up the scrotum allow it to regulate the distance between the testes and the rest of the body. When the testes become too warm to support spermatogenesis‚ the scrotum relaxes to move the testes away
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fertilize each with sperm and implant all of them in the woman’s womb in the hope that one will result in pregnancy. (Robertson) But some women can only supply a single egg. Through the use of embryo cloning‚ that egg might be divisible into‚ say 8 zygotes for implanting. The chance of those women becoming pregnant would be much greater. (Kassirer) Secondly‚ it would benefit a couple at high risk of having offspring with a genetic disease choose weather to risk the birth of an affected child. (Robertson)
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(third) ampulla of the fallopian tubes how long does it take the zygote to get from the fallopian tubes to the uterus? about 3-4 days it takes 7-10 days to complete the process of implantation (nidation) how long do eggs and sperm live? eggs live about 24 hours sperm live from 48-72 hours‚ approx 3 days what are the stages of fetal development? 0-2 weeks are zygotes 3-8 weeks are embryos 9-38+ weeks are fetus when is the developing
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released from her ovaries in order to be ready for possible fertilization. During this time‚ a man’s sperm reaches the ovum and unites with it creating a zygote‚ and fertilization occurs inside the woman. This is when the journey of prenatal development is launched (2013). After the conception‚ there is a considerable amount of change in the zygote. Its first cell duplication does not complete until approximately 30 hours after conception (Berk‚ 2013). Duplication continues to increase over the
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did Darwin study that led him to the theory of natural selection? 5. What is Tiktaalik? 6. What are two tetrapod characteristics of Tiktaalik? 7. What is systematics? 8. What is this called? 9. What are synapomorphies? 10. Zygote _______ ________ _________ Growth 11. How many germ layers does a blastula have? 12. What happens during gastrulation? 13. What type of digestive structure do flatworms have? 14. What is an example of a pseudocoelomate
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Adaptations In charophyceans- layer of sporopollenin prevents exposed zygotes from drying out Allows plants to live further from water Derived Traits of Plants (5) 1. Apical meristems (elongate shoots and roots through primary growth) 2. Alternation of generations (multicellular diploid sporophyte-meiosis-haploid spores-divide mitotically-multicellular haploid gametophyte) a. Fertilization of haploid gametes=diploid zygote b. Diploid zygote=sporophyte generation c. Sporophyte generation=gametophyte; gametophyte
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Development • Divided into 3 periods: The Germinal Period The Embryonic Period The Fetal Period • The Germinal Period – Takes place 2 weeks after conception – Includes the: • creation of fertilized egg‚ called a zygote‚ • cell division‚ • and the attachment of the zygote to the uterine wall. • The Embryonic Stage – 2-8 weeks after conception – Cell differentiation‚ organs begin to appear – Begins when blastocyst attaches to the uterine wall (now called embryo). – Life support systems
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