Look up the SRY gene located on the sex chromosomes. The SRY gene when turned on in epistatis controls that.
cause testes need a a colder environment to function,if it was in a warmer place of the boddy their function isn't guaranteed
fetus
The testes descend in a human male fetus before birth to ensure optimal conditions for sperm production and fertility. The descent occurs from the abdominal cavity into the scrotum, where the cooler temperature is necessary for spermatogenesis. This process is influenced by hormonal changes, particularly testosterone, and is crucial for the proper development of the male reproductive system. If the testes do not descend properly, it can lead to conditions such as cryptorchidism, which may affect fertility and increase the risk of testicular cancer.
before birth the zygote develops first into an embryo and the into a fetus
The Gonads
pregnancy
The required time for the development of a fetus is called gestation or pregnancy.
Gestation, and the baby is called a fetus.
Men have testes because they produce sperm, which is necessary for the fertilization of ova. This fertilization results in the development of a fetus.
In the fetus, the testes are in the abdomen. As development progresses they migrate downward through the groin and into the scrotum. This event takes place late in fetal development, during the eighth month of gestation.
An Embryo is a stage before Fetus, the Fetus is more developed than an Embryo, the stage of Birth and a baby being more developed than a fetus.
It nourishes the fetal pig.