Why is it important for the testes in pigs and other mammals to completely descend into scrotum?

Because sperms need a little less temperature

Because it requires a lower temperature for the testis to produce sperms

That is termed cryptorchidism

A male's testicle's descend into the scrotum after birth, to allow them to function. The testicles, need a lower temperature than that of the body in order to manufacture sperm.

This would be the scrotum. The testicles descend into the scrotum usually within the first few months of life.

Boy's testicles descend from their abdomen into their scrotum.

Your testes descend from abdominal cavity to the scrotum. There is difference of one degree Celsius from body. It is lower in the scrotum. This one degree Celsius lower temperature is necessary for production of the sperms.

too keep them at the correct temperature to produce that most amount of sperm

They need a temperature which is slightly lower than that of the body's internal organs.

Yes, the scrotum is in front of the penis instead of behind it.

Infants have their testicles in their scrotum from before birth, if they are not there at birth, then the doctor will have to do a procedure to get them to descend from the abdomen.

because it is to hot to be inside the body the scrotum restores it

They need to be slightly cooler than body temperature to produce sperm. Why we developed this way is anyone's guess.

It doesn't have to. Simply make a small incision in the scrotal sac and let that baby drop.

If the testes are not maintained at a temperature about 2 °C lower than body temperature the process of spermatogenesis will not take place, so that is why it is important for the testes to descend into the scrotum during maturation.

Sperm require a temperature lower than body temperature in order to develop properly. It's too warm inside the body.

The location of the scrotum is important because it maintains a temperature of a few degress cooler than body temperature. That cooler temperature is needed to produce sperm.

They will descend (drop) by the time you are roughly 8 weeks old. You are born with them in the scrotum but they can ascend into the abdominal cavity occasionally until you reach puberty (this is when they grow and can no longer fit).

This can have two meaning, either literal or slang. The literal term, means after birth for a males testicles to descend in to the scrotum. The slang, means for a boy to reach puberty (though this is phrase is misleading, because the testicles don't descend during puberty, but shortly after birth).

To be clear on the terms: The scotum is the sack-like pouch beneath the penis. Inside the scrotum lie two testicles. From your questions, I'm guessing that you mean testicles and not "scrotum". If you mean testicles, and not scrotum, the condition you are describing is most likely cryptorchism. This condition arises when one (or both) of the testicles do not descend from the abdomen within the first year or so after birth. The testicles…

In medical terminology, it is known as cryptorchidism. In the fetal life, testes are abdominal organs from where they descend to scrotum before birth. The common term is "undescended testicle".

Cryptorchidism is when one or both of the testicles fails to descend into the scrotum. It is also called undescended testicle(s). Uncorrected cryptorchidism can increase the risk of male infertility and testicular cancer.

For sperm production, the testes need to be slightly cooler than the normal body temperature and to achieve this they descend into the scrotum which is outside the body core. The testes are located outside the body in the scrotum, because sperm production requires a cooler temperature then the internal body temperature of animals.

The female ovaries are generally developed about 100 days after fertilization. The male testis do not descend into the scrotum until the ninth month of development although this sometimes occurs after birth.

....scrotum support the testes