define copulation in humans briefly explain
Answers
It occurs due to muscle movements in the male reproductive system.
Sperm or
spermatozoa are produced in the testes and stored there. This process is called
spermatogenesis. They are released from testes during ejaculation. The hormone
Testosterone (androgen) is responsible for production of sperm.
The corpus spongiosum is the tube like structure
that contains the urethra. Urethra tube
is the passage for both urine and semen. The sperm moves from testes into the
ductus deferens. Then into pelvic cavity. Then they move into the prostate over
the ureter. Then sperms move into urethra through the vas deferens and forced
out of urethra by ejaculation.
That sperm ejaculation action is stimulated by
sympathetic nerves. The peristalsis muscle movements help sperm move forward. The contraction in muscles forces sperm to propel forward with force and speed.