The Sperm and the Egg
To describe the role of the sperm and the egg we must understand what their function is. Many times the first time you hear about the egg and the sperm is in a health class, in middle school. No wants to hear about what the teacher is saying so they blank it out until they have to write a paper on it. Then you become a parent and have to explain to your own children and you wished you had learned how the sperm and the egg worked, so you can explain to your own children.
First, I will try to explain the journey of the sperm and its final destination the egg. The man has an organ called the testes. In these testes has a unique reproductive system. In the testes, they secrete hormones and produce cells. In the case of the testes, the germ cells are sperm and the sex hormones are androgens. (Human sexuality, 2005) The spermatogenesis is the formation and development of the spermatozoon. The devolvement of the spermatozoon, are cells which sperm cells arise will divide by mitosis. The primary spermatocyte divides by meisosis to form secondary spermatocytes The spermatides differentiae to form sperm cells. (Seely,2008) The most important androgen is testosterone. The testosterone is where the boys turn into a man that is where they develop of secondary sex characteristics such as the beard, a deep voice, and muscle mass. When boys are born, they will have set number of underdeveloped sperm cells, which are not technically sperm. Eventually the cell will mature at puberty and they will create the reproductive type cells.
The egg on the other hand starts when a girl is born she will have all of the ova she will ever have (about 2 million), but they are immature in form.(Human sexuality,2005 ) About 400,00 or so will survive until puberty. During a woman’s reproductive years, from puberty to menopause, only 400 or so ripened ova, typically 1 per month, will be released by their follicles for possible fertilization.(Seely,2008) Oogensis...
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