Animal Reproduction Male Reproductive Anatomy - PowerPoint PPT Presentation

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Animal Reproduction Male Reproductive Anatomy

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Male Reproductive Anatomy ... of sperm cells storage of sperm cells Vas Deferens passageway for sperm cells Accessory Glands Seminal Vesicles Prostate Gland ... – PowerPoint PPT presentation

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Title: Animal Reproduction Male Reproductive Anatomy


1
Animal ReproductionMale Reproductive Anatomy
  • Original Power Point Created by Linda Rist
  • Modified by Georgia Agricultural Education
    Curriculum Office
  • June 2002

2
Male Reproductive Tract
  • Testes - male gonad
  • located externally in scrotum except in birds
  • produce sperm
  • produce male hormone - testosterone

3
Scrotum
  • thermal regulatory organ
  • temperature control necessary for sperm
    production
  • cannot occur at body temperature

4
Scrotum
  • heat can cause infertility
  • spermatogenesis - maturation of sperm cells -
    takes about 50 days

5
Epididymis
  • 3 portions
  • caput - head
  • corpora - body
  • cauda - tail
  • diagram

6
Epididymis
  • 10 - 15 days for the sperm cells to pass through
    the epididymis
  • Functions -
  • maturation of sperm cells
  • storage of sperm cells

7
Vas Deferens
  • passageway for sperm cells

8
Accessory Glands
  • Seminal Vesicles
  • Prostate Gland
  • Cowpers gland

9
Accessory Glands
  • Provide 95-98 of total ejaculate volume

10
Seminal Vesicles
  • secrete fructose - energy source for sperm
  • 40-80 of ejaculate volume

11
Prostate Gland
  • secretes enzymes
  • 15-30 of ejaculate volume

12
Cowpers Gland
  • cleanse and neutralize urethra
  • keep sperm from dying

13
Urethra
  • passageway for semen
  • carries semen to the end of the penis

14
Retractor Muscle
  • retracts penis
  • pulls the penis back within the sheath

15
Sigmoid Flexor
  • extends penis from the sheath

16
Penis
  • deposits semen in the female reproductive tract

17
Sheath
  • encloses the penis
  • not present in primates

18
Hormones
  • testosterone
  • functions
  • stimulate spermatogenesis
  • maturation of sperm cells

19
Hormone functions
  • development of accessory sex glands
  • Libido - sex drive
  • builds muscle
  • Responsible for male characteristics
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