8-10 hours. It helps you take in information and remember things if your brain is well rested and you don't have to force yourself to wake up.
<span>If you have contracted a vector-borne pathogen</span>
Answer: The pineal gland produces melatonin
B. testes - the Sertoli cells of the Testes are where sperm mature and the Leydig cells of the Testes generate Testosterone
The vas deferens is a delivery tube connecting the testes to the prostate/urethra for export, and the penis is only a conduit to deliver the sperm inside semen during coitus.
The epididymis only stores mature sperm in preparation for the next ejaculation.
The body shivers, shivering is something your body does in oder to keep warm. It is moving the muscles around, and trying to heat you up.