Talk:Human Physiology/The male reproductive system
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I notice that you only have 1 image in this chapter, so i went out and found a few new ones for you: 
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There are a number of other images on the server that are...more graphic. You find some of these images at Commons:Category:Penis, Commons:Category:Semen. and Commons:Category:Testicles. I would double-check with your professor before you put any images of nude people in the book, however. --Whiteknight(talk) (projects)23:34, 7 August 2006 (UTC)
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[edit] Possible additions
You may want to consider adding more material about spermatogenesis (what is going on in the seminiferous tubules?), semen content (contribution of various glands and functions of those secretions), production of testosterone by cells of Leydig in the testicles, and maybe more on the processes of erection and ejaculation. I think it is fine that you are concise. Provophys 03:21, 8 August 2006 (UTC)
[edit] Cells of Leydig
I added a section on cells of leydig and production of testosterone. I'm wondering if I should go more into detail or not.-Shaleneroberts, Apr 11, 2007
[edit] Overview of Male Reproductive System Structures & Function
I added this section. It really needs to be made into a table or two, but I don't know how. If anyone knows how to put things into tables, please feel free! And I don't really like the heading I came up with. Any ideas for a better heading? -Shaleneroberts, Apr 11, 2007
[edit] Chemotaxis
Chemotaxis: Chemotaxis is a kind of taxis, in which bodily cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. This is important for bacteria to find food (for example, glucose) by swimming towards the highest concentration of food molecules, or to flee from poisons (for example, phenol). In multicellular organisms, chemotaxis is critical to development as well as normal function. In addition, it has been recognized that mechanisms that allow chemotaxis in animals can be subverted during cancer metastasis.
I added this to the glossary, but I'm wondering if I should add it to the sperm production after the last paragraph. I think it's necessary to add it somewhere, because I don't know what chemotaxis is and it was mentioned in the "sperm production" section. Anyone's thoughts? -Shaleneroberts, Apr. 11, 2007
[edit] Puberty
The word apocrine glands is mentioned in the third stage of puberty. I added an explanation of it in the glossary but was wondering if it should be added elsewhere as well. Any thoughts? -Shaleneroberts, Apr.11, 2007
[edit] Sertoli Cells
Added this under "structure", but I don't know if it's too much info. How in debth do we want to go with this? Anyone feel free to make suggestions or edit it yourself.-Shaleneroberts, Apr. 11, 2007
| Structure | Function |
|---|---|
| Testes (2) | produces sperm, testosterone and inhibin.(2-5% of semen) |
| Scrotum | keeps the testes the proper temperature |
| Dartos Muscle | smooth muscle that wrinkles scrotum to regulate temperature of testes |
| Cremaster Muscle | skeletal muscle that raises or lowers the testes for temperature regulation |
| Seminiferous Tubules | The main functional unit of the testes, where spermatogenisis takes place |
| Interstitial Cells (cells of Leydig) | cells responsible for production of male sex hormones (i.e., testosterone) |
| Sertoli Cells | |
| Efferent Ductules | ductules that transport sperm from testis to epididymus |
| Testicular Arteries (gonadal artery) | blood supply to the testes |
| Epidiymus (2) | site of sperm maturation and storage |
| Ductus Deferens (2) | duct for sperm maturation, storage and transport |
| Ejaculatory Duct (2) | duct for transporting sperm and glandular secretions |
| Penis | erectile organ for sexual intercourse |
| Accessory Glands | |
| Seminal Vesicle (2) | secretes fructose and most of the seminal fluid.(65-75% of semen) |
| Prostate Gland | secretes watery alkaline fluid to raise vaginal pH.(25-30% of semen) |
| Bulbourethral gland (2) | secretes lubricating mucus.(< 1% of semen) |
[edit] Height Growth in boys
What is estradiol? Is that a typo? It's in this paragraph. Anyone know? I think we need to put in an explanation if that is indeed the word it's supposed to be.-Shaleneroberts, Apr. 11, 2007
Height growth in boys Compared to girls' early growth spurt, growth accelerates more slowly in boys and lasts longer, resulting in a taller adult stature among males than females (on average about 10 cm or 4 inches). The difference is attributed to the much greater potency of estradiol compared to testosterone in promoting bone growth, maturation, and epiphyseal closure. In boys, growth begins to accelerate about 9 months after the first signs of testicular enlargement and the peak year of the growth spurt occurs about 2 years after the onset of puberty, reaching a peak velocity of about 8.5-12 cm or 3.5-5 inches per year. The feet and hands experience their growth spurt first, followed by the limbs, and finally ending in the trunk. Epiphyseal closure and adult height are reached more slowly, at an average age of about 17.5 years. As in girls, this last growth primarily involves the spine rather than the limbs.
