Guy Stuff

1
Guy Stuff

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• A quick tour of essential anatomy and related
  function.

2
Testes

• Paired
• Develop from gonads within abdomen then descend
  into scrotal sacs
• Scrotum maintains testes at cooler temperature
• Sterility, due to too high body temperature.

3
Sperm

• Produced inside seminiferous tubules in testes.
• Matures in tubular epididymides behind each
  teste.
• Interstitial cells produce male sex hormone
  testosterone.

4
More Sperm...

• Composed of three parts head, middle piece, and
  tail.
• Mitochondria ring middle piece and provide energy
  for sperm movement
• 100 million per ejaculation BUT...

5
Mature Sperm

• Propelled into vas deferens (ductus deferens) by
  muscle contractions.
• Move out of storage into urethra for ejaculation.

6
Prostate Gland

• Surrounds urethra below bladder secretes milky
  alkaline fluid (one component of semen) that aids
  sperm motility and survival.
• Enlargement common problem

7
Cowpers Gland

• Also known as bulbourethral glands.
• Have mucous secretions with lubricating effect.

8
Seminal vesicles

• Two seminal vesicles join two vas deferns
  secrete nutrients for sperm at time of
  ejaculation.
• Ejaculatory duct is single duct leading from two
  vas deferens carries semen to urethra.

9
Penis

• Spongy tissue inside shaft of penis is flaccid
  with normal blood flow.
• Erection increased blood flow to spongy tissue
• Impotency is failure to become erect

10
Path of Sperm ...

• Epididymus
• Vas Deferens
• Urethra
• Vagina
• Oviduct