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Topic: Male reproductive system (human)

	HUMAN REPRODUCTION 95
		Male and female human reproductive systems develop from a similar set of embryological structures, and many structural and functional parallels exist.
		The major organs of the male reproductive system are the testes (testicles), the prostate, the seminal vesicles, the vas deferens, the epididymis, and the penis.
		The male sterilization procedure, or vasectomy, is named for this duct because the operation involves cutting the vas deferens so that the sperm cells cannot travel from the testes to the penis.
	mtsu32.mtsu.edu:11422 /315/reproency.html (2576 words)

	Male reproductive system (human) - Wikipedia, the free encyclopedia
		The human male reproductive system is a series of organs located outside of the body and around the pelvic region of a male.
		The male contribute to reproduction by ejaculating sperms into the female's vagina.
		In the body of an average male, there are two testicles located in a sac called the scrotum.
	en.wikipedia.org /wiki/Male_reproductive_system (573 words)

	Male reproductive system (human) Summary
		Male gonads are the testes, which produce both sperm (the male mature gamete is spermatozoa) and male sex hormones.
		Male duct system arises from the mesonephric (Wolffian) ducts, a proliferation from the primitive kidney that serves as excretory duct, and is under hormonal control.
		The human male reproductive system is a series of organs located outside of the body and around the pelvic region of a male.
	www.bookrags.com /Male_reproductive_system_(human) (1948 words)

	The Reproductive System - DESIGN, WORKINGS, AILMENTS, TAKING CARE (Site not responding. Last check: 2007-10-22)
		Although not directly involved in the reproduction process, mammary glands play an important role in providing nourishment for a newborn baby and their activities are controlled by hormones of the reproductive system.
		The activities of both reproductive systems are controlled by hormones (chemicals produced by the body that affect various bodily processes) released from the pituitary gland, which is located at the base of the brain behind the nose, and from the gonads in each system.
		The pills contain hormones that are released into a woman's system on a regular basis to prevent pregnancy, either by inhibiting ovulation, preventing implantation of a fertilized egg, or by thickening the secretions throughout a woman's reproductive system so that her partner's sperm has less of a chance to meet her egg.
	www.faqs.org /health/Body-by-Design-V2/The-Reproductive-System.html (9620 words)

	Reproductive System
		In internal fertilization, the eggs are fertilized within the reproductive tract of the female, and then are covered with eggshells and/or remain within the body of the female during their development.
		Males who have not been circumcised need to keep the area between the glans and the prepuce clean so bacteria and/or yeasts don’t start to grow on accumulated secretions, etc. there.
		Normally, in humans, after the onset of puberty, due to the stimulation of follicle-stimulating hormone (FSH) one egg”; per cycle matures and is released from its ovary.
	biology.clc.uc.edu /courses/bio105/reproduc.htm (2386 words)

	reproductive system. The Columbia Encyclopedia, Sixth Edition. 2001-05
		In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus takes place; the male reproductive system produces the male reproductive cells, the sperm, and contains an organ that deposits the sperm within the female.
		In the human female reproductive system, ova are produced in the ovaries, two small organs set in the pelvic cavity below and to either side of the navel.
		In the male reproductive system sperm are produced in the seminiferous tubules of the testes, two organs contained in the scrotum, an external sac in the groin.
	www.bartleby.com /65/re/reprosys.html (703 words)

	Reproductive System - The male reproductive system
		The reproductive system is a group of organized structures that make possible the creation, or reproduction, of new life for continuation of a species.
		Human reproduction is sexual, meaning that both a male and a female contribute genetic material in the creation of a new individual.
		The main tasks of the male reproductive system are to produce sperm cells and to introduce sperm into the female reproductive tract.
	www.scienceclarified.com /Qu-Ro/Reproductive-System.html (1005 words)

	Histology BIOL 4000 - Male reproductive system - Lecture Notes 15
		The remaining ducts and associated glands of the human male reproductive system develop between the 8th and 12th weeks of gestation.
		Ducts associated with the male reproductive tract in the order that a spermatozoon would pass through them on it's way to urethral opening at the tip of the penis.
		Structure of the ducts of the male reproductive tract.
	www.auburn.edu /academic/classes/zy/hist0509/html/Lec15Malereproductsystem.html (1788 words)

	Male Reproductive System
		The male gamete, or sperm, and the female gamete, the egg or ovum, meet in the female's reproductive system to create a new individual.
		Both the male and female reproductive systems are essential for reproduction.
		Humans, like other organisms, pass certain characteristics of themselves to the next generation through their genes, the special carriers of human traits.
	www.kidshealth.org /parent/general/body_basics/male_reproductive.html (2132 words)

	The educational encyclopedia, reproductive system, anatomy, male and female reproductive anatomy
		How human reproduction works from a biological standpoint, the purpose of sex is to merge two sets of genetic information, one from the father (sperm) and one from the mother (egg), to make a baby that is genetically different from either parent
		Female reproductive system the organs of the female reproductive system are specialized to produce and maintain the female sex cells, or egg cells, to transport these cells to the site of fertilization, to provide a favorable environment for a developing offspring, to move the offspring to the outside, and to produce female sex hormones
		Male reproductive system the primary function of the male reproductive system is reproduction, which includes the production of spermatozoa, the transportation of spermatozoa from the testes out of the male body, the secretion by glands, and the placement of spermatozoa in the female reproductive tract.
	www.educypedia.be /education/reproductivesystem.htm (745 words)

	[Regents Prep Living Environment] Reproduction & Development: Human Reproductive Systems
		The structure and function of the human male reproductive system, is very similar to that of many other mammals.
		The structure and function of the human female reproductive system, is very similar to that of many other mammals.
		Human reproduction and development are influenced by factors such as gene expression, hormones, and the environment.
	regentsprep.org /Regents/biology/units/reproduction/human.cfm (606 words)

	Center for Male Reproductive Medicine and Microsurgery
		This may be related to the human (upright) posture and hydrostatic pressure on venous testicular outflow, or other unknown factors, but it is necessary for clinicians to be aware of the high incidence of subfertility in men.
		Perhaps it is a reflection of the incredible ability of humans to adapt the environment to promote their own survival or the expectation that fertility should be nearly spontaneous, but many human couples seek evaluation for infertility.
		The human epididymal epithelium is relatively homogeneous as viewed under the microscope, and grossly, the epididymis does not have the same distinct gross anatomical subdivisions that are easily seen in the rat, rabbit and other animals.
	www.maleinfertility.org /new-anatomy.html (3170 words)

	Reproductive
		The reproductive system is the system that allows for the continuation of the human species.
		The role of the male’s reproductive system is to manufacture sperm and then to deliver them to the female’s reproductive tract where fertilization may occur.
		If fertilization occurs the female reproductive system is designed to nurture and care for the cell that will soon grow into a baby.
	library.thinkquest.org /11965/html/cyber-anatomy_reproductive.html (239 words)

	Sexual Health: Your Guide to the Male Reproductive System
		Unlike the female reproductive system, most of the male reproductive system is located outside of the body.
		The entire male reproductive system is dependent on hormones, which are chemicals that regulate the activity of many different types of cells or organs.
		The primary hormones involved in the male reproductive system are follicle-stimulating hormone, luteinizing hormone, and testosterone.
	www.webmd.com /sex-relationships/guide/male-reproductive-system (1023 words)

	Center for Male Reproductive Medicine & Human Sexuality (Site not responding. Last check: 2007-10-22)
		MUSE System — system whereby the patient injects a pellet containing Aprostadil into his urethral opening to promote an erection.
		Prostate gland - works along with the seminal vesicles to produce the fluids that combine with sperm as it moves through the male reproductive system to form semen that is ejaculated during sexual intercourse.
		Seminal vesicles — glands that work along with the prostate to produce the fluids that combine with sperm as it moves through the male reproductive system to form semen that is ejaculated during sexual intercourse.
	www.humed.com /urologysites/malerepro/glossary.shtml (482 words)

	Alcohol and the Male Reproductive System
		This system of endocrine glands and hormones includes a brain region called the hypothalamus; the pituitary gland, located at the base of the brain; and the male gonads (testes).
		Thus it appears that alcohol's damaging effects on reproduction are mediated at all three levels of the male reproductive unit: the hypothalamus, pituitary, and testes.
		Although the litter size of the alcohol-exposed males was reduced by 46 percent, the average individual weight of the pup offspring of paternally alcohol-exposed animals was higher.
	pubs.niaaa.nih.gov /publications/arh25-4/282-287.htm (4095 words)

	reproductive system — FactMonster.com
		In humans and other mammals the female reproductive system produces the female reproductive cells (the eggs, or ova) and contains an organ in which development of the fetus takes place; the male reproductive system produces the male reproductive cells, the sperm, and contains an organ that deposits the sperm within the female.
		reproductive system: In the Human Male - In the Human Male In the male reproductive system sperm are produced in the seminiferous tubules of...
		Your Body's Systems - Your Body's Systems Circulatory System The circulatory system is the body's transport...
	www.factmonster.com /ce6/sci/A0841566.html (178 words)

	THE HUMAN REPRODUCTIVE SYSTEM
		However, in the case of the reproduction process, two different systems are required, of different sexes, male and female.
		In addition, both the male and the female reproductive systems do not perform their function continuously from birth onwards in the same way as, for instance, the respiratory system and the digestive system!
		years), the female reproductive system normally goes through a series of regular changes which are called the menstruan cycle, because it is repeated month after month.
	www.biotopics.co.uk /human2/reprsy.html (681 words)

	Men's Health > Exposure To Dioxins Influences Male Reproductive System
		A dioxin toxin contained in the herbicide Agent Orange affects male reproductive health by limiting the growth of the prostate gland and lowering testosterone levels, researchers at UT Southwestern Medical Center have found in a cohort study of more than 2,000 Air Force veterans who served during the Vietnam War.
		These include a decrease in sperm production by almost 50 percent, a three- to four-fold increase in testicular cancer, an increase in the incidence of cryptorchidism (undescended testes, a condition where the testes are not in their normal location in the scrotum) and hypospadias (abnormality of the urethra).
		Dioxins are among the most toxic substances known and are thought to be partially responsible for this increase in male reproductive tract disorders.
	www.emaxhealth.com /3/8299.html (937 words)

	the REPRODUCTIVe system
		Humans do not have a mating season, females are sexually receptive to the male at all times of the year.
		During male arousal, blood flows into the three shafts of spongy erectile tissue inside the penis, causing it to become elongated and erect.
		About 40 of the cases are due to male problems, 40 due to female problems and the remaining 20% are caused by some unknown agent(s).
	www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookREPROD.html (3022 words)

	BioEd Online Slides: human, human systems, human anatomy, testis, ovary
		Negative feedback systems are control mechanisms that operate by inhibiting a process or activity that originally led to starting the process or activity.
		The motor division of the PNS is further divided into the somatic nervous system (regulates activities under voluntary control) and the autonomic nervous system (regulates involuntary activities).
		The portion of the autonomic nervous system that is most active during normal activities is called the parasympathetic system.
	www.bioedonline.org /slides/slide01.cfm?q=human&pg=5 (1625 words)

	Fluoride's adverse effects on the Male Reproductive System
		objective was to study reproductive parameters in a population exposed to fluoride at doses of 3-27 mg/day compared with a group of individuals exposed to fluoride at lower doses: 2-13 mg/day.
		Reversal of fluoride-induced alteration in cauda epididymal spermatozoa and fertility impairment in male mice.
		The influence of human menopausal gonadotropin, natrium fluoride and cyproterone acetate on the spermatogenesis in immature rats.
	www.fluoridealert.org /pesticides/nrc.male.repro.april.2004.htm (4903 words)

	Male Reproductive System (Site not responding. Last check: 2007-10-22)
		The male reproductive system consists of the germinal tissue (seminiferous tubules), a conducting portion (ex current ducts), and associated glands.
		In the human, there are about 500 seminiferous tubules/testis that empty into the labyrinth of the rete testis that connect to about 20 ductuli efferentes that connect to a single epididymis at the head of the epididymis.
		The glands that empty their contents into the ex current system prior to the post-prostatic urethra contribute to the semen volume and contain elements that nurture the sperm on their honorable journey to fertilize the egg.
	anatomy.iupui.edu /courses/histo_D502/D502f03/f03_labs/Lab17/Lab.17.male.repro.f03.html (2017 words)

	Reproductive System (Site not responding. Last check: 2007-10-22)
		Testosterone is the major male hormone, and estrogen and progesterone are the major female hormones.
		Systems adapted for development of sperm or ova followed by successful fertilization, development, and birth offspring.
		In men and women the organs of the reproductive system are adapted for the specific sequence of functions that permit development of sperm or ova followed by the successful fertilization and the normal development and birth of offspring.
	www.medceu.com /course-no-test.cfm?CID=733 (1103 words)

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