For the same reason an Oak tree produces so many acorns. So that maybe one of them manages to make it to the egg and fertilize it.
in the testicles!The average man will produce 1 million sperm cells a day. To get these sperm cells you can moleste him with your hands, suck on his genitals and wait for his release, or just have sex with him.
Sperm cells are made in organs called testes
The egg cells. Sperm are manufactured daily. A woman is born with all the eggs she will ever produce.
On average, a man produces about 1,500 sperm cells per second, amounting to millions of sperm cells in a 24-hour period.
Only one sperm is needed to produce a baby, but when diagnosing male infertility, the rule of thumb is that the man must produce at least 2ml of fluid, with 20 million sperm per ml (so 40 million in a sample), half of which must be motile and correctly formed. If he meets all of this criteria, he is considered fertile. This is tested after 3 days of no sexual activity.
Sperm leave a man's body through the penis.
Make sex cells are called sperm and female sex cells are called ova
In a normal adult male, both testicles produce sperm cells pretty much continuously. It's not made "on demand", as it were, but is stored until needed (or until the sperm cells die, at which point they're reabsorbed).
spermatogenesis.
It depends on the age of the person. There are more mutations and defects in eggs as the woman ages. However, as men are constantly producing more sperm cells they will inevitably produce more cells that have mutations. The percentage of sperms cells that have mutations will increase as the man ages.
A man produces about 1,500 sperm cell every second. It only takes one sperm cell to make a baby.
Men continue to produce sperm all their lives. there are children are fathered by 90 year old's. the quality and motility of the sperm reduces as a man ages. Between the ages of 30 and 50 there is a 30% drop in the sperm count. and they are 37% slower.