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Millions of men experience prostate problems every year. But what defines prostate enlargement and how does the prostate grow as it enlarges?...
What puts a man at risk of having an enlarged prostate? And what causes the prostate to grow in the first place? Answer your questions here....
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Q: Lump
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paulwall
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Replies(5)
paulwall
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paulwall
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micke
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Kia
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| kia_breizzze wrote: |
ok! Here goes - questions on a postcard please. scrotum - this sac hangs outside the body and holds the testicles and epididymis. The scrotum automatically tightens up to keep the testicles warm or hangs low to help cool them off. testicles - the 2 testicles, or testes, produce and store millions of tiny sperm cells. The testicles are oval-shaped and grow to be about 2 inches (5 centimeters) in length and 1 inch (3 centimeters) in diameter. The testicles are also part of the endocrine system because they produce hormones, including testosterone. epididymis - a set of coiled tubes (one for each testicle) that connects to the vas deferens. seminal vesicle - are sac-like structures attached to the vas deferens to the side of the bladder prostate gland - produces some of the parts of semen, surrounds the ejaculatory ducts at the base of the urethra, just below the bladder. vas deferens - a muscular tube that passes upward alongside the testicles and transports the sperm-containing fluid called semen bladder - where urine collects. urethra - the channel that carries the semen to the outside of the body through the penis. The urethra is also part of the urinary system because it is also the channel through which urine passes as it leaves the bladder and exits the body. penis - made up of 2 parts: the shaft and the glans. The shaft is the main part of the penis and the glans is the tip (sometimes called the head). At the end of the glans is a small slit or opening, which is where semen and urine exit the body through the urethra. The inside of the penis is made of a spongy tissue that can expand and contract. sperm production - once a male has reached puberty, he will produce millions of sperm cells every day. Each sperm is extremely small: only 1/600 of an inch (0.05 millimeters) long. Sperm develop in the testicles within a system of tiny tubes called the seminiferous tubules. At birth, these tubules contain simple round cells, but during puberty, testosterone and other hormones cause these cells to transform into sperm cells. The cells divide and change until they have a head and short tail, like tadpoles. The head contains genetic material (genes). The sperm use their tails to push themselves into the epididymis, where they complete their development. It takes sperm about 4 to 6 weeks to travel through the epididymis. The sperm then move to the vas deferens, or sperm duct. The seminal vesicles and prostate gland produce a whitish fluid called seminal fluid, which mixes with sperm to form semen when a male is sexually stimulated. The penis, which usually hangs limp, becomes hard when a male is sexually excited. Tissues in the penis fill with blood and it becomes stiff and erect (an erection). The rigidity of the erect penis makes it easier to insert into the female's vagina during sexual intercourse. When the erect penis is stimulated, muscles around the reproductive organs contract and force the semen through the duct system and urethra. Semen is pushed out of the male's body through his urethra - this process is called ejaculation. Each time a guy ejaculates, it can contain 250 - 500 million sperm. |
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gus5555
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