To expound: body temp is too high for sperm, hence the whole scrotum shebang. If it's cold, and the testicles require a raise in temperature, the scrotum shrinks a bit and moves further towards the body in order for body heat to raise its temp. Vice versa when it's warm.
I really don’t understand how putting a sensitive internal organ on the outside of the body to better control temperature was the easier path than sperm that can tolerate being like 2 degrees warmer
Oh yeah once it happened I understand why it stayed. But sperm producing organs started inside, so I would’ve expected slight preferences for temperature by sperm would be easier to change than moving an organ outside.
To expound: body temp is too high for sperm, hence the whole scrotum shebang. If it's cold, and the testicles require a raise in temperature, the scrotum shrinks a bit and moves further towards the body in order for body heat to raise its temp. Vice versa when it's warm.
If you stare at them long enough you can even watch them go up and down.
deleted by creator
Or make men run at lower temperature.
Become lizard
I really don’t understand how putting a sensitive internal organ on the outside of the body to better control temperature was the easier path than sperm that can tolerate being like 2 degrees warmer
It was just the first solution to be good enough
Oh yeah once it happened I understand why it stayed. But sperm producing organs started inside, so I would’ve expected slight preferences for temperature by sperm would be easier to change than moving an organ outside.
They probably moved outside when we evolved from cold-blooded to warm-blooded, and body heat was too much for the current design.