It happens around the clock, with hundreds of millions of sperm produced daily.
four haploid cells.
Continuously
the secondary spermatocyte
No. The only thing that it has is the nucleus in a head, an acrosome on the head so it can enter the egg, mitochondria to drive the flagella. Only the nucleus enters the egg and that is all it contributes to the zygote.
The scrotum needs to be able to move away from the body and closer to it depending on the need for heat. If your body is to hot the sack will expand and move away from your body and if it becomes to cold it will tighten and move into your body. This is all done with sperm production in mind as if its too hot or cold the sperm will die.
LH, or luteinizing hormone, stimulates the Leydig cells in the testes to produce testosterone. Testosterone plays a critical role in maintaining male reproductive function, including sperm production and development of secondary sexual characteristics.
Coming from a fellow guy like me, it depends. You can sperm (cum) in a minute or you can last for ten(like me) but I believe it depends on the guy and I also think it depends how big his dick is. Mine is 7 inches.
Spermatogenisis produces four gametes while oogenesis produces only one. Oogenesis produces one egg and three polar bodies (that immediately die off). Spermatogenisis produces four sperm that are al equally complex. The egg is the major part of the potential fertilized cell and it takes a lot of energy to make (think about it, all it needs to start dividing is a few extra chromosomes) and therefore most of the process's energy goes to the egg.
The cytoplasm divides unequally during the production of ova (Oogenisis) This is because out of the four daughter cells created during meiosis, only one is needed to produce a single ovum, whearas in Spermatogenisis all four evolve to become sperm; thus the cytoplasm is divided equally.
multiplication phase, growth phase and maturatio phase