Life Cycle of the Sperm and Egg

This is a story about Spike and Edna and how they created new life. Spike is a sperm that is very excited about his day. Edna is an egg that feels like the luckiest egg ever. Spike and Edna both feel lucky because they were chosen for fertilization today. Spike and Edna are going to fertilize by combining together to create a new life. Edna has been waiting for this day since she was created in Katie’s ovaries while she was just a fetus. Edna was not the only egg created while Katie was a fetus. Edna is just one of five million other eggs but today is Edna’s lucky day.

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Today Edna has been chosen especially for fertilization. Spike has also been one of many to be chosen to participate in fertilization. Spike is just one of 500 million sperm that will be ejaculated today by Troy. Spike began his life in Troy’s testes in the seminiferous tubules. Spike has been growing a maturing inside of Troy’s body for two months now and he is ready to go. Spike has heard that ejaculation is the greatest roller coaster ride ever. He knows that he has to wait for this wonderful ride to begin through the urethra. Spike anxiously awaitswith the other 499 million sperm in the epididymis.

The ride begins by Spike waiting in the epididymis and then he begins to move through the Vas deferens, the tube that carries all the sperm from the testes to the ejaculatory duct of the penis (Rathus, Nevid, & Fichner-Rathus, 2007, p. 113). . While he is in the urethra, Spike is covered in all kinds of secretions from the prostate gland. These secretions are going to help Spike follow through the urethraand get to the female ovum which is where Edna is. In order to get to Edna, Spike and all the secretions from the prostate are pushed through Troy’s body during ejaculation.

Ejaculation is when a male ejaculates sperm and secretions from the prostate bland using contractions from Troy’s pelvic muscles. Pushing Spike along the way are also fluids from the seminal vesicles which contain sugars. Once Spike is ejaculated out through Troy’s penis, he then enters into Katie’s vagina where he starts to search for Edna. Edna has waited a very long time for this day. Even though Spike is only a couple of months old, Edna is 23 years old just like Katie. You see, Edna was created inside of Katie when she was just a fetus.

Edna is so very excited because none of her 183 that have left already have had the opportunity to be fertilized and there are still 216 other eggsthat could be fertilized. You see when an egg is ready to be fertilized, it is called ovulation and only 400 of Katie’s 500 thousand eggs will get the opportunity to ovulate. Edna learned that ovulation is a grand experience that happens within a matter of a minute or two. Ovulation is when Edna the egg (aka ovum) is released from Katie’s ovary (Rathus, Nevid, & Fichner-Rathus, 2007, p. 86).

What happens is a small part of Katie’s follicle that faces her abdomen bursts and a fluid runs out which is full of millions of cells. Amongst all of these cells is Edna and the cells with her provides nourishment for her. Now that Edna is ready to experience ovulation, Katie’s fallopian tubes are getting signals that they should get ready for Edna to come on down. Edna has experienced ovulation now and is beginning to travel down Katie’s fallopian tubes. Little fingers-like tubules caught Edna as she started down the fallopian tubes.

Edna decides to hang out in Katie’s fallopian tubes and get herself ready to meet up with Spike to create another person. Now that Katie is ready, she is waiting for Spike to come through Katie’s fallopian tubes so they can begin fertilization. While Troy and Katie were having sex, Troy ejaculated Spike through his penis onto Katie’s cervix which is at the farthest end of Katie’s vagina. Spike is so excited. His long journey to Edna has just begun. It is only about 6 or 7 inches to Katie’s fallopian tubes but he knows it is going to take him several hours to get there.

Spike is an extremely good speed swimmer and Katie’s fallopian tubes are showing him prime fluids to swim in so he should make it there with no troubles. Spike did not know this but as he started to swim his long journey to the fallopian tubes, he started to change. The fluids in the cervix, uterus, and fallopian tubes caused him to change into something known as capacitated, which means he’s ready to fertilize Edna. Good thingfor Spike is that Edna has already experienced ovulation so once he gets to the fallopian tubes he won’t have to wait for her like some of his friends.

Some of his friend sperm have waited for several days fortheir ovaries. Spike has so much energy because he is full of mitochondria. This mitochondria has helped him and about a hundred other sperm to reach Edna’s outside wall. Edna gets very excited because she knows that one of these sperm is Spike and he is going to fertilize her. All the sperm that are outside of Edna begin to drill their heads into Edna, it doesn’t hurt her though. Their drilling has cause Edna to turn clockwise. Spike is a smart sperm.

He knows that Edna is cover in all kinds of nutrient cells that will make it hard for him to get in so he begins to clear them off. Spikes cap, or acrosome, comes off and special enzymes come out. These enzymes are like a soap that helps to wash off those enzymes from Edna so Spike can get in. This has been a long and hard process so far and a lot of Spikes friends have died because of the hard work. Spike keeps going though. He really wants to fertilize Edna. Spike is pushing and drilling when all of a sudden, he feels something. He does it; he breaks through Edna’s wall.

He broke through the inner cell plasma of Edna. Something absolutely amazing is happening, Edna’s outer shell changes. She shuts down her outer shell to where other sperm cannot get through. Some sperm are almost through and she blocks them out completely. Spike looks back and smiles. He does not have a chance to tell his friends good bye but he’s not worried about that. He is proud because he has managed to break through Edna’s shell, a task that 500 million other sperm tried to do when they were ejaculated. Even though Spike is excited, he knows his work is not completely done.

He now has to break through Edna’s inner shell and reach her inner cell membrane. Spike starts twisting and turning like a drill. He keeps drilling and drilling. He has passed through Edna’s inner cell membrane and is still working towards nucleus which holds her genetic material. He touches her genetic material when all of a sudden their nuclei are drawn together. There nuclei begin to fuse together. Immediately, their different hereditary characteristics are joined together and they begin to form the makings of a new person. The long journey for Spike and Edna is completed.

They have both traveled through strange waters and overcome many obstacles to get where they need to be. However, they both managed this and completed the process of fertilization. Both Edna and Spike are contented knowing that they are creating a new human life together. References: Human embryology. (2007). _Retrieved October 4, 2009, from Encyclop? dia Britannica Online_ Rathus, S. , Nevid, J. , & Fichner-Rathus, L. (2007). Human Sexuality in a World of Deversity. , n. d. : Pearson Education, Inc.. Retrieved October 4,2009.

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