Sperm are the male reproductive cells. Most animals and plants use sperm to reproduce.
The name sperm is taken from the Greek word sperma meaning seed.
Each sperm cell looks rather like a tadpole, with a head capsule containing containing a nucleus, a middle portion containing mitochondria (which provide energy) and a long tail called a flagellum. The flagellum acts like a motor to propel the sperm cell through the female reproductive system.
The name sperm is taken from the Greek word sperma meaning seed.
Each sperm cell looks rather like a tadpole, with a head capsule containing containing a nucleus, a middle portion containing mitochondria (which provide energy) and a long tail called a flagellum. The flagellum acts like a motor to propel the sperm cell through the female reproductive system.
For centuries, sperms were thought to move by wiggling their tails side-to-side, like eels. But recent research showed that they roll as they move forward like a spinning top.
All human sperm rotate their flagellums anticlockwise when swimming.
Aristotle believed hot sperm created male babies and cold sperm created female babies.
Preformationism was a popular belief until the 19th century that sperm contained miniature humans called humonculi. Supposedly, the womb was the perfect environment for the humonculi to grow into full-size humans, explaining how babies were born.
Roald Dahl wrote a book, My Uncle Oswald, about a scheme to steal sperm from successful people and create the world's most valuable sperm bank.
For every 200 million sperm in each human ejaculation, two million make it into the cervix, one million make it into the uterus, 10,000 make it to the top of the organ, 5,000 enter the uterotubal junction, 1,000 enter the Fallopian tube, 200 reach the egg and only one enters the egg to fertilize it.
A single human male produces enough sperm in two weeks to impregnate every fertile woman on the planet.
One of the world's mediumst sperm banks stopped accepting donations from red-haired men due to low demand.
Sperm counts have declined by 59% in males living in developed countries over the last four decades. No single reason has been established, though fertility scientists blame stress, obesity, chemical exposure, and smoking.
Sperm is highly effective in treating wrinkles, and anti wrinkle products use similar materials to sperm because of how well it works.
Sperm contains zinc and calcium which help fight tooth decay.
Mouse sperm is mediumr than elephant sperm.
Sperm can still be harvested from men who are already deceased for 36 hours after death. The sperm can be gathered and used for posthumous fertilization.
All human sperm rotate their flagellums anticlockwise when swimming.
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| Human sperm stained for semen quality testing. By Bobjgalindo 7 |
Aristotle believed hot sperm created male babies and cold sperm created female babies.
Preformationism was a popular belief until the 19th century that sperm contained miniature humans called humonculi. Supposedly, the womb was the perfect environment for the humonculi to grow into full-size humans, explaining how babies were born.
Roald Dahl wrote a book, My Uncle Oswald, about a scheme to steal sperm from successful people and create the world's most valuable sperm bank.
For every 200 million sperm in each human ejaculation, two million make it into the cervix, one million make it into the uterus, 10,000 make it to the top of the organ, 5,000 enter the uterotubal junction, 1,000 enter the Fallopian tube, 200 reach the egg and only one enters the egg to fertilize it.
 |
| A sperm cell attempting to enter and merge with an egg. |
One of the world's mediumst sperm banks stopped accepting donations from red-haired men due to low demand.
Sperm counts have declined by 59% in males living in developed countries over the last four decades. No single reason has been established, though fertility scientists blame stress, obesity, chemical exposure, and smoking.
Sperm is highly effective in treating wrinkles, and anti wrinkle products use similar materials to sperm because of how well it works.
Sperm contains zinc and calcium which help fight tooth decay.
Mouse sperm is mediumr than elephant sperm.
Sperm can still be harvested from men who are already deceased for 36 hours after death. The sperm can be gathered and used for posthumous fertilization.
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