...THE SPERM AND THE EGG The Sperm and The Egg PSY/ 265 March 20, 2014 I am Egg. I have taken the long, dark journey into the infundibulum. This is the outermost part of the woman’s fallopian tube. Sperm, my soul mate, has been waiting for me to make this trip for an eternity. The sperm is the germ cell of a male. We can now finally meet. I have been waiting for this instant for so long now. I am very much looking forward to meeting him. I am one of some 400,000 eggs that have developed in this woman’s ovaries since puberty. Some 400 of us have survived to this point in her life and have ripened into ova. I finally get to be the one ova that is released during this month’s ovulation. The other ova have their growth suppressed by me for this special event. My home has always been the ovary. I am now moving into a new spot in town, the fallopian tube. Here I will await my friend Sperm’s arrival. It has taken me some time to get from the ovary to this point. Now, only two weeks remain before the woman’s next menstruation. I am so small that this 4 inch tube has taken me a long time to traverse. The cilia that line the tube helped to push me along down the tube’s length. The cilia are miniscule hair-like structures that make this possible. They were able to move me along at a rate of an inch each day. Today is my first full day in the fallopian tube. I trust that Sperm will be making...
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...By: Lisa Smith This is a story about Jim the Sperm, and Lisa the Egg. This is a very exiting day for Jim and Lisa for they are going to get fertilized. Fertilization is when Jim and Lisa will fuse together and become a new individual. Lisa has been waiting for this day for 22 years since her egg was produced, when she was in the fetal ovaries, along with five million who are waiting to be chosen. For Lisa haven been the lucky one others she was chosen. Jim feels like he has won a million bucks for he was the only one out of 500 million mobile sperm to be discharged. Today in just one ejaculation that will be fertilized. Jim’s life begins in the somniferous tubes, inside the testes. Where he has been for 2 months maturing. Before the great ejaculation, he moves himself to the epididymis awaiting; the great push that pushes him through urethra. When Jim enters the urethra, he is mixed with a secretion from the prostrate gland. This contains substance that is called ciliate his long awaited journey to Lisa. First of all Jim the sperm and the prostate secretion are discharged with immense forced by the way of a contractions of the pelvic muscles and then they followed by a sugar-containing fluid from the seminal vesicles. From there he exits the penis into the vagina and he begins his journey to fertilization upon entering the vagina he has a journey himself. For Jim is a high swimmer and is on his way to the fallopian tubes where he will meet Lisa. On his journey Jim will start...
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...Running head: THE SPERM AND THE EGG Assignment: The Sperm and the Egg 1 YOUR NAME PSY/265 DATE NAME OF PROFESSOR The Sperm and the Egg It has certainly been a wild adventure on my way to the infundibulum, which serves as the outer component of a female’s fallopian tube (Nevid, Rathus & Fichner-Rathus, 2005). My name is ‘Egg’. In fact, all of my siblings share the same exact name! I am anxiously awaiting my friends to arrive. They are all named ‘Sperm’ and are considered to be male germ cells. It has been quite a long time since I last saw them. I have been preparing for their arrival for quite some time and cannot wait to see them! It was a daunting task to be here in the first place. The ovary in which I live near had roughly 400,000 other eggs; however, when she was younger, she experienced puberty; as a result, only 1% of us made it to transformed into ripened ova. I am finally able to be the ova responsible for suppressing the development of additional ova in order to be discharged during the ovulation period (Nevid, Rathus, et al., 2005). As soon as I made my journey away from the ovary, I travelled all of the way to the fallopian tube. I am now still in the fallopian tube waiting for my friends to come over. It took a great amount of effort for me to journey through the fallopian tube; as such, ovulation occurs roughly every two weeks prior to menstruation. The tube I travelled through is only four inches in length; however, in order for me to be...
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...The Sperm and the Egg Well, to better understand how babies are born, you have to understand how the entire process works between the sperm and the egg. The reproductive system of the male has two essential functions and those are production of sperm and the delivery of the sperm to the reproductive tract of the female. The sperm production takes place in the testes (male’s testicles). Basically, each testicle has to produce and start spermatogenesis. Spermatogenesis has several different processes that start at the primary spermatocyte and go to secondary spermatocyte, into spermatids then finally into plain sperm with a mid-piece tail. Testosterone is needed for the making of sperm. The responsibility of the female in a successful reproduction is definitely higher than that of the male. The female must produce eggs, be able to receive sperm from the male, provide the right environment to host the fertilization and implantation and have the ability to nourish the developing baby before and after birth. Egg formation takes place in the ovaries. For a woman to become pregnant, the sperm must enter the vagina within 5 days before or on the exact day of ovulation. Ovulation takes place about two weeks after the beginning of menstruation. Sexual activity dilates the arterioles that supply blood to the penis. The vagina is penetrated when blood accumulates in three different sinuses in the penis, and it becomes enlarged because of pressure. Ejaculation occurs...
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...Sperm Bank Responsibility I am not a believer on sperm banks or artificial insemination. But for some people that can’t have children or the lesbians in the world that want to have a child and be able to carry a pregnancy for 9 months. Sperm responsibility should be taken with consideration because it can be dangerous if not handled correctly due to the fact that if it were to get too spilled out somewhere or not inserted correctly then it was a waste of time for the buyer. Selecting a correct donor is up to the buyer and or the couple selecting the donor’s sperm, they might be looking for different things about the person; for example is the donor athletic or are they tall and skinny or their race. I wouldn’t want to be a sperm donor then I would want to be able to communicate with the new parents and the child but in the sperm bank industry that never happens unless it is approved by the buyer. I think sperm banks are waste of time because what woman wouldn’t want to feel the pleasure of sex and love making and that deep connection they would have if they were with someone they love. There’s always the risk for diseases and cancer from the donor, or other aspects that might come up and then the donor might be held accountable. But once the buyer makes the deposit inside of her than it’s up to her and her partner on how to take care of the child. I believe if that if anything happens to the child that they tell the donor because that sperm is part of the donor and that...
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...million sperm enter the vergina soon afterwards millions of them will either flow out of the vergina or die in the civic environment however many survive because of the protective elements provided in the fluid surrounding them, next the sperm must past the cervix and open into the uterus, usually it is tightly closed but for a few days it stays open whilst the woman ovulates, the sperm swim through the cervical mulches, then once inside the cervix the sperm continues swimming towards the uterus then millions will die trying to make it through the mulches, resident cells from the woman’s immune system mistake the sperm for following intruders and can kill thousands more, then half of the sperm head for the fallopian tube, and the other half swim towards the tube containing the unfertilised egg, now only a few thousand remain, inside the fallopian tube tiny cilliur push the egg towards the uterus to continue the sperm must serge against this motion but some of the sperm gets caught in the cillur and die, at long last the sperm meet the egg only a few dozen of the 3 hundred million remain, the sperm must push through the first layer on the egg to reach the outer layer of the egg, the zone polucida when the sperm reach this they attached to specialised sperm receptors on the surface which trigurs there actor zones which realise active jensises enabling to sperm to borrow into the layer. The first sperm to make contact will fertilise the egg after this journey a single sperm attaches...
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...bacteria gets exposed to any give antibiotic, most of the bacteria will die. However, if some bacteria cells have resistance due to plasmids, they will survive. They will then pass this trait to their offspring, which will be a fully resistant generation. 3. Tooth reduction is one of the major evolutionary trends that developed among major vertebrate groups that allowed for the transition from aquatic to terrestrial life. Evolution of limbs and being able to breath air are other evolutionary trends that took place. 4. The nonvascular plants and even a few vascular plants like ferns reproduce by having the sperm swim through the external environment. This swimming requires a water film in the external environment, and also requires that the ovum be in a structure close enough to the ground that the sperm can swim to it. Gymnosperms and angiosperms make pollen. Sperm are confined within a pollen grain. So no swimming is required. Wind and animal pollination/dispersal has helped plants a lot. If a plant lives in the water and let a bunch of its gametes...
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...vagina. He releases millions of sperm when ejaculation occurs. And the sperm have been deposited they have a long and arduous journey ahead of them, like salmon entering the mouth of a river to swim upstream to spawn. Some of the sperm swim straight up into the fallopian tubes through the cervix and uterus. - And some of them are so fast, that sperms have been found in the tubes in as little as a few minutes after ejaculation. I’m one of them joining the rides. Some sperms die in the acidic vaginal fluid; and some enter the cervical mucus and cervical crypts. During this time, the sperms are released in small numbers and these continue to swim towards the fallopian tubes. Over the millions of sperms released in an ejaculate, only a few hundred of us will make the arduous trip unto the egg successfully. Perhaps this is why so many millions of sperms are produced in the first place even though only one is needed to fertilize the egg - because the wastage is so prodigal. During the time the sperm spend in the female reproductive tract, while swimming towards the egg, they acquire the capacity to fertilize it - a process called capacitation. When the sperms reach the corona cells (only a few hundred successfully make the trip, guided by chemicals produced by the egg which serve as guiding beacons to the sperms) they become hyperactivated - they start beating their tails in frenzy. This is useful because it provides the mechanical energy the sperm head needs to burrow its way through...
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...to the ability to conceive a child. The success depends on internal and external factors. Nutrition, diet and exercise are all key in the overall chance of conception. But there may be factors that may be out of your control. Infertility refers to the inability to conceive a child naturally. About 10% of women (6.1 million) that range in the ages of 15-44 have fertility issues. But infertility isn’t just a woman’s problem. One-third of all infertility issues are due to issues with the man. One of those is called Azoospermia. In a normal male, the testicles in the scrotum produce sperm that flows through the epididymis, vas deferens, and seminal ducts. Sperm mixes with fluid in the seminal ducts to form semen. Azoospermia is a condition where there are no sperm in the semen. Non-obstructive Azoospermia refers to abnormal sperm production and obstructive Azoospermia refers to normal sperm production with some sort of obstruction. Many years ago there wasn’t much hope for those with non-obstructive Azoospermia as it was thought they would never be able to conceive a child. Luckily with advancements in testing and diagnostic procedures it is now known that there is an equal chance of the capability of both non-obstructive and obstructive Azoospermia men to conceive child through IVF treatments. What is the treatment for Azoospermia? Is there hope for those men with Azoospermia? Does the diagnosis of Azoospermia rule out the chances of ever conceiving a child? Although...
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...prostate and bulbourethral glands. B. One reliable birth control method that Ryan is unlikely to select at this time in his life is a vasectomy. What is a vasectomy and what happens to a man’s sperm after the procedure? A vasectomy is a surgery that cuts the vas deferens, which is the tube that carries sperm from the testicles to the urethra. After a successful vasectomy sperm is unable to travel out of the testes. C. Why do sperms have at most 48 hours to live after ejaculation? a. The middle piece contains mitochondria arranged in a spiral, which provide ATP for locomotion of the sperm to the secondary oocyte and for sperm metabolism. Seminal fluid is alkaline and the inside of the female vagina is acidic causing destruction of the sperm. They are usually unable to live in the acidic environment for more than 48 hrs. D. Megan is hoping to become pregnant someday. When the day comes, in which part of her body would fertilization of her secondary oocyte likely occur? a. Fertilization usually occurs in the uterine tubes after ovulation has occurred. This usually takes place in the ampulla of the uterine tube. E. How could damage to Megan’s uterine tubes complicate fertilization or pregnancy? a. If there is scar tissue as a result of infections, sperm could possible not reach the oocyte for fertilization. If it does, and scar tissue is present the oocyte could implant with uterine tube or pelvic cavity. F. The Pap smear that Megan mentions is a routine...
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...THE SPERM AND THE EGG 01 The Sperm and the Egg Jessie Stolberg PSY/265 Jori Reijonen, Ph.D THE SPERM AND THE EGG 02 Twenty-six years have passed, and Grace, one of the many million eggs produced while still in the fetal ovaries will finally take the journey to become fertilized. It has been a long wait for her, but soon she will join with Leon, the lucky sperm who will help Grace form a new individual. Leon, being the only sperm discharged out of many million for the day is on a mission to successfully complete his journey. His sole purpose is to meet up with Grace and let the creation of a new individual begin. In the seminiferous tubules, inside the testes, Leon's life begun. He moves himself to the epididymis before the ejaculation, waiting for the push that will guide him through the urethra. While in the urethra, a secretion from the prostate gland is mixed with him in order to help him on his journey to find his female ovum better known as Grace. Leon and the secretion are discharged by strong forces due to contractions of the pelvic muscles. They are followed by a fluid containing sugar from the seminal vesicles, which are glands that empty...
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...the correct answer. 1. What is also known as fertilized egg? a. gamete c. sperm b. ovum d. zygote 2. When does a new life start? a. When egg and sperm cells unite b. When mature egg cells leave the ovary c. When sperm cells travel to meet the egg cell d. When an egg cell is fertilized by a sperm cell 3. How often does an egg cell mature and leave the ovary? a. once a day b. once a week c. once a month d. once a year 4. When is a female already capable of reproduction. a. becomes 12 years old b. becomes 20 years old c. starts menstruating d. reaches adulthood 5. What do you call the flattened, oval-shaped part of a sperm? a. head c. nucleus b. neck d. connecting piece 6. What is the whitish fluid that carries sperm cells? a. semen c. vesicles b. urine ...
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...situations. Same sex parents have equal parental rights as the standard male and female parents. After they split and have a child or children involved they can end up having a custody battle. Judges have to be very careful and be very educated on this matter in order not to end having their judgment overturned because they simply violated the other parent’s constitutional rights. This happened in a case I read about dealing with a same sex couple that split up and had a child. The partner of a lesbian birth mother in a civil partnership can now be considered in law to be the child's second parent, if the child was born after 6 April 2009, and can be named on the child's birth certificate (http://www.bionews.org.uk/page_116900.asp). The male sperm donor did not want to be involved at all. This just left the two ladies battling it out for parental rights. The female that carried the child thought she had all the legal rights as the parent but it played out differently. The court ruled that the female that was the egg donor had equal parental rights. They are still working out the visitation and child support kinks. The situation of a female getting in vitro fertilization without the approval of her ex- boyfriend surely has to be illegal in some many ways with so many people at fault. There is an article about a female named Anetria that stole her...
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...and transport sperm (the male reproductive cells) and protective fluid (semen) * To discharge sperm within the female reproductive tract during sex * To produce and secrete male sex hormones responsible for maintaining the male reproductive system Unlike the female reproductive system, most of the male reproductive system is located outside of the body. These external structures include the penis, scrotum, and testicles. * Penis: This is the male organ used in sexual intercourse. It has three parts: the root, which attaches to the wall of the abdomen; the body, or shaft; and the glans, which is the cone-shaped part at the end of the penis. The glans, also called the head of the penis, is covered with a loose layer of skin called foreskin. This skin is sometimes removed in a procedure called circumcision. The opening of the urethra, the tube that transports semen and urine, is at the tip of the penis. The penis also contains a number of sensitive nerve endings. The body of the penis is cylindrical in shape and consists of three circular shaped chambers. These chambers are made up of special, sponge-like tissue. This tissue contains thousands of large spaces that fill with blood when the man is sexually aroused. As the penis fills with blood, it becomes rigid and erect, which allows for penetration during sexual intercourse. The skin of the penis is loose and elastic to accommodate changes in penis size during an erection. Semen, which contains sperm (reproductive...
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...Below, we'll see how natural identical twins relate to modern cloning technologies.How is cloning done?You may have first heard of cloning when Dolly the Sheep showed up on the scene in 1997. Cloning technologies have been around for much longer than Dolly, though.How does one go about making an exact genetic copy of an organism? There are a couple of ways to do this: artificial embryo twinning and somatic cell nuclear transfer. How do these processes differ?1. Artificial Embryo TwinningArtificial embryo twinning is the relatively low-tech version of cloning. As the name suggests, this technology mimics the natural process of creating identical twins.Open large version In nature, twins occur just after fertilization of an egg cell by a sperm cell. In rare cases, when the resulting fertilized egg, called a zygote, tries to divide into a two-celled embryo, the two cells separate. Each cell continues dividing on its own, ultimately developing into a separate individual within the mother. Since the two cells came from the same zygote, the resulting individuals are genetically identical.Artificial embryo twinning uses the same approach, but it occurs in a Petri dish instead of in the mother's body. This is accomplished by manually separating a very early embryo into individual cells, and then allowing each cell to divide and develop on its own....
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