Sperm

Hello, my name is Samuel the sperm. I will be taking you on a journey today, from how I became a sperm all the way until I make my grand exit. We will start with the process of meiosis, which is how I got to become a spermatozoon. Like any good journey, we have to have a setting. In this instance, we are in the testes, the male reproductive organ that produces sperm. The process of becoming a spermatozoon all starts with a process called interphase. During this time, chromosomal DNA is being replicated. After interphase, each cell has 46 chromosomes, and is therefore called a diploid cell. Each of those chromosomes have two identical strands of DNA. Those two strands of DNA are called “sister chromatids”, and are joined by a centromere. We…

A. Size and Structure - sperm, the smallest cell within the human body, are only a few micrometers long. It is composed of a head, midpiece, and tail. Within the head are the nucleus, condensed DNA containing 23 chromosomes, and the acrosome. The acrosome is located at the end of the head and is considered a modified lysozome containing digestive enzymes that are capable of breaking through the outer layer of an egg. The midpiece of the sperm contains mitochondria that produce the energy for the…

The sperm cell makes it journey through the body to make it to the egg. This article discus the journey this sperm cell will make to get to the egg to fertilize it. It starts with talking about the cell and how it works. As it says in the article “The sperm starts out as a round, immobile cell. An important structure, the "acrosomal body," that will eventually develop highly erosive enzymes--able to dissolve the membranes around other cells--is made by Sertoli cells at the newly-developed head…

Medical advances in sperm preservation has advanced over the years with sperm still being viable after several years. It is not just the anonymous donor making a deposit at a sperm bank for money, but males preserving their sperm before serving in the military or before getting cancer treatments. They want to preserve their sperm in the event they become infertile or in some cases die. Often if they are in a serious relationship they leave specific instructions on who takes ownership of the…

will turn to sperm donation and artificial insemination.You might choose a sperm donor to help when unable to conceive such as a woman who doesn 't have a male partner or a couple experiencing male infertility. Like many things, there are both beneficial and unbeneficial outcomes to sperm donors. Some benefits being that it will help mothers trying to conceive and same sex couples along with the men and women who are serving in our military. A few unbeneficial issues being not knowing the…

Over the years of scientific advancements, people have gained access to the sperm banks where sperm gets frozen in liquid nitrogen to be used for later use. One of the most famous banks was The Repository for Germinal Choice created by Robert Klark Graham which was publicized in 1970 (Plotz 1). Although there are many men who can’t have biological children due to many reasons including; low sperm count, poor sperm motility, and abnormal sperm shape (Simon 1), the main question still stands.…

Introduction Sea urchin gametes are an excellent model for observing vertebrate development. Sea urchins are a low cost species that can be maintained in a laboratory environment, have external fertilization and have distinct stages for viewing development in offspring. They are external breeders, so when the gametes are mature, they are released into seawater. The seawater carries the gametes where they will fertilize and develop. How does the sperm find the eggs? The jelly coating on the…

The testes contain seminiferous tubules, composed of several hundred tightly coiled tubules lined with germs cells. These tubules serve as the site of sperm production. Inside of these tubules spermatogonia progress to spermatocytes, then spermatids, and finally sperm. Also inside, sustentacular cells serve as a means of support. These cells control the environment by removing wastes, providing nutrients, and providing antibody protection as well as regulating sperm production. Interstitial…

DISCUSSION Spermatozoa and its Arrival to the Egg Before embarking in the complexity of CatSper channels, the particular characteristics of sperm and its movement towards the egg in female that allows for fertilization should be addressed. Spermatozoa are differentiated motile cells that have two main structures: the head, which houses packed DNA, and the flagellum, the motility portion that transports the sperm genetic information to the egg (1). Within the spermatozoa head both a vesicle…

In the beginning, that initial appointment consisted of a thorough consultation on the numerous fertility procedures available contingent upon the reason for infertility. Upon entering the room, Dr. Whitman gave an introduction of her, asked more about our inability to conceive, and discussed the success rate of a myriad of fertility procedures executed in the medical facility. Additionally, my husband had a semen analysis completed to analyze his sperm count to rule out infertility on his…