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Lecture 23. Human Reproductive System. Anatomy of the Male Reproductive System. Testes Produce spermatozoa (gametes) Produce androgens (hormones) Series of ducts Accessory glands (3) Secretions added to sperm to form semen Seminal vesicle, prostate gland, and bulbourethral gland.

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Lecture 23

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Lecture 23 l.jpg

Lecture 23

Human Reproductive System


Anatomy of the male reproductive system l.jpg

Anatomy of the Male Reproductive System

  • Testes

    • Produce spermatozoa (gametes)

    • Produce androgens (hormones)

  • Series of ducts

  • Accessory glands (3)

    • Secretions added to sperm to form semen

    • Seminal vesicle, prostate gland, and bulbourethral gland

Ureters

Urinary bladder

Seminal vesicle

Ejaculatory duct

Ductus

deferens

Prostate gland

Bulbourethral

gland

Urethra

Anus

Penis

Epididymis

Glans

Testis

Prepuce

Scrotum

Fig. 28.11


Anatomy of the male reproductive system3 l.jpg

Anatomy of the Male Reproductive System

  • Supporting structures

    • Scrotum

      • 2 chambered sac that contains testes

      • Muscles help regulate temperature

    • Penis

      • Important sexual organ and part of the urinary system

Ureter

Penis

Urinary bladder

Ductus

deferens

Spermatic cord

Epididymis

Cremaster muscle

Testis

Dartos muscle

Scrotum

Fig. 28.12


Descent of testes l.jpg

Descent of Testes

  • Descent

    • Pass from abdominal cavity through inguinal canal to scrotum


Testes l.jpg

Testes

  • Compartments divided by septa

    • Seminiferous tubules

      • Empty into efferent ductules

      • Efferent ductules empty into epididymis

    • Epididymis

      • Site of sperm cell maturation

      • 12-16 days

Fig. 28.13


Male reproductive structures ducts l.jpg

Male Reproductive StructuresDucts

Urinary bladder

  • Ductus deferens or vas deferens

    • Passes from epididymis into abdominal cavity

  • Ejaculatory duct

    • Joining of ductus deferens and seminal vesicle

Ureter

Seminal vesicle

Ejaculatory

duct

Prostate

gland

Bulbourethral

gland

Ductus

deferens

Urethra

Epididymis

Testis

Fig. 28.15


Male reproductive structures urethra l.jpg

Male Reproductive StructuresUrethra

Urinary bladder

  • Urethra

    • Extends from urinary bladder to distal end of penis

    • Passageway for urine and male reproductive fluids

Ureter

Seminal vesicle

Ejaculatory

duct

Prostate

gland

Bulbourethral

gland

Ductus

deferens

Urethra

Epididymis

Testis

Fig. 28.15


Male reproductive structures penis l.jpg

Male Reproductive StructuresPenis

  • Three columns of erectile tissue that engorge with blood

    • Corpora cavernosa (2)

    • Corpus spongiosum (1)

  • Glans penis

    • Prepuce or foreskin covers

      • Circumcision: Surgical removal

Urinary bladder

Ureter

Corpus

cavernosum

Urethra

Testis

Penis

Corpus

spongiosum

Glans

Fig. 28.15

Clinical View, pg. 866


Anatomy of female reproductive system l.jpg

Anatomy of Female Reproductive System

Ureter

  • Female reproductive organs

    • Ovaries

    • Uterine tubes

    • Uterus

    • Vagina

    • External genital organs

    • Mammary glands

Uterine tube

Ovary

Fimbriae of

uterine tube

Uterus

Urinary bladder

Cervix of uterus

Rectum

Urethra

Vagina

Clitoris

Anus

External urethral

orifice

Vaginal orifice

Fig. 28.2


Uterine tubes l.jpg

Uterine or fallopian tubes or oviducts

Open directly into peritoneal cavity to receive oocyte from ovary

Transport oocyte or zygote from ovary to uterus

Uterine Tubes

Uterine tube

Infundibulum

Uterus

Fimbriae

Ovary

Broad ligament

Ureter

Cervix

Vagina

(a) Posterior view

Fig. 28.3


Uterus vagina l.jpg

Uterus & Vagina

  • Uterus

    • Parts: fundus, body, cervix

    • Composed of 3 layers

      • Perimetrium: Serous membrane

      • Myometrium: Smooth muscle

      • Endometrium: Mucous membrane

Fig. 28.7


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Female External Genitalia

  • Vulva external female genitalia

    • Vestibule: Space

      • Labia minora: Form borders on sides

      • Clitoris: Erectile structure

        • Corpora cavernosa

        • Corpora spongiosa

Fig. 28.9


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Review Question

The structure of the female reproductive system that is homologous to the penis of the male system is the

  • Vagina

  • Labia minora

  • Uterus

  • Fallopian tubes

  • Clitoris


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Points to Remember

  • Male and female reproductive systems share similarities as evidence of homology

  • Important functions of:

    • Production of gametes and sex hormones

    • Production of sperm (temperature-sensitive)

    • Receiving sperm (semen is mixture of sperm and secretions of three accessory glands)

    • Providing site for development of fetus and birth

    • Breast milk secretions provide nourishment


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Questions?


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