2006-08-03 11:24:53 · 8 answers · asked by jxt299 7 in Health ➔ Men's Health
Once a guy 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 (pronounced: seh-muh-nih-fuh-rus too-byoolz). 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 (pronounced: ih-jah-kyuh-lay-shun). Each time a guy ejaculates, it can contain up to 500 million sperm.
When the male ejaculates during intercourse, semen is deposited into the female's vagina. From the vagina the sperm make their way up through the cervix and move through the uterus with help from uterine contractions. If a mature egg is in one of the female's fallopian tubes, a single sperm may penetrate it, and fertilization, or conception, occurs.
This fertilized egg is now called a zygote (pronounced: zy-goat) and contains 46 chromosomes - half from the egg and half from the sperm. The genetic material from the male and female has combined so that a new individual can be created. The zygote divides again and again as it grows in the female's uterus, maturing over the course of the pregnancy into an embryo, a fetus, and finally a newborn baby.
2006-08-03 11:35:36 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Ok Sperm can only live for 2 to three days max. The reason for this is that the vagina is extremely acidic, within 5 minute the sperm is in a gel( you know how cumm looks it looks jelly like, well in 5 minutes it starts to liquefy, and once that happens the sperm does not have much time until they are no longer protected and do not have much energy left. Sperm have all the equipment that they need when journying into the uterus to fetilize the ovum(egg). It takes the sperm around 5 to 10 minutes to reach the egg. So they swimm 14 to 15 mm per minute. I hope that was helpful. I learned this stuff in embryology.
2006-08-03 11:37:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Can Sperm Swim
2016-11-05 04:30:56 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Sperm cell swims very fast. They have a long tail so they can swim. A sperm cell last only for a day.
2006-08-03 12:39:04 · answer #4 · answered by koko 3 · 0⤊ 0⤋
1
2017-02-09 18:51:26 · answer #5 · answered by ruben 4 · 0⤊ 0⤋
7 inches per hour - live from 2-5 days after ejaculated.
2006-08-03 13:16:17 · answer #6 · answered by cyberlegend1994 4 · 0⤊ 0⤋
you answered my question, so i'll answer yours...
I don't know how fast, but i know they don't live for long and and designed to reach the egg at all costs. That's all i know
2006-08-03 11:27:41 · answer #7 · answered by Anonymous · 0⤊ 0⤋
very fast, only powerful microscope can be seen with.
they dont go very far, and i think they die if exposed outside to the atmosphere.
2006-08-03 11:29:40 · answer #8 · answered by shamz 3 · 0⤊ 1⤋