Examlex
The Big Bang theory is supported by two major lines of evidence that alternative models have not successfully explained. What are they?
Dartos
is a layer of smooth muscle in the scrotum that contracts in response to cold, wrinkling the scrotal skin and helping to regulate the temperature of the testes.
Scrotal Sac
The pouch of skin holding and protecting the testicles in male mammals, also aiding in temperature regulation for spermatogenesis.
Steroid Hormone
A class of hormones synthesized from cholesterol that includes testosterone, estrogen, and cortisol, which play key roles in various bodily functions.
Testosterone
A primary male sex hormone important for the development and maintenance of male secondary sexual characteristics, as well as reproductive functions.
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