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SF4 - Test 3 > 3 - Male Reproductive Histology > Flashcards

3 - Male Reproductive Histology Flashcards

1
Q

What are the primary and secondary sex organs?

A

Primary = Gonads = Testes; sperm cells and hormones

Secondary = Storage, Survival, Conveyance of Sperm

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2
Q

What is the site of sperm production?

What are the intratesticular genital ducts?

What are the extratesticular genital ducts?

What are the Acessory glands?

A
  • What is the site of sperm production
    • Semiminferous Tubules
  • Intratesticular genital ducts
    • Tubuli Recti
    • Rete Testis
    • Efferent Ductules
  • Extratesticular Genital Ducts
    • Epididymis
    • Ductus Deferens
    • Ejaculatory Duct
    • Urethra
  • Accessory Glands
    • Seminal Vesicles
    • Prostate
    • Bulbourethral Glands
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3
Q

What is the path of sperm production, modification, and ejaculation?

A
  1. Testis
  2. Epididymis
  3. Ductus Deferens
  4. Seminal Vesicle
  5. Prostate
  6. Bulbourethral Glands
  7. Urethra

SPERM DURING EJACULATION: SEVEN UP

Seminiferous Tubules

Epididymis

Vas Deferens

Ejaculatory Udcy

Nothing

Urethra

Penis

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4
Q

What coveres the testis?

What forms the septa that organize the seminiferous tubules into lobules?

A

Testes are covered by tunica albuginea

Tunica Albuginea invaginates to form septa that organize the seminiferous tubules into lobules

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5
Q

Where does sperm formation occur?

What cells populate the lining epithelium of seminiferous tubules?

What cells are located between the seminiferous tubules?

A

Spermatogenesis occurs in the seminiferous tubules

  1. Sertoli Cells support, nourish, and regulate the activity of spermatogenic cells; forms Blood Testes Barrier (BTB)
  2. Spermatogenic Cells in various stages of development
    - - -

Interstitial Cells (Endocrine Leydig) produce and secrete testosterone; controls development of spermatozoa within the tubule; occurs continuously through life

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6
Q

What is the role of Sertoli Cells?

What controls the rate of spermatozoa formation?

What is the pathwat for intratesticular ducts?

A

Secrete growth factors/nutrients, waste removal, secrete inhibin (prevent auto-immune action against sperm)

Testosterone controls the rate of sperm formation

Seminiferous Tubules - Tubuli Recti - Rete Testes - Efferent Ducts

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7
Q

Once spermatogenic progenitor cells undergo mitosis to produce what?

Upon completion Meiosis I, what is formed?

Upon completion of Meiosis II, what is formed?

A

Primary Spermatocytes

Two haploid Secondary Spermatocytes

Four haploid Spermatids

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8
Q
A

Seminiferous Tubules

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9
Q
A

Seminiferous tubule dark black line

Dotted line is Leydig Cell–secrete testosterone, b/t tubules

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10
Q

What cells is shown within tubule, arrow off screen?

A

Sertoli Cell

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11
Q

What short, straight ducts do spermatozoa produced in seminiferous tubules pass through?

What do these connect to?

A

Tubuli Recti

Rete Testis

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12
Q
A

S = Seminiferous Tubules

T = Tubuli Recti

R = Rete Testis , lined by cuboidal epithelium

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13
Q
A

ST = Seminiferous Tubules; with S - Septa in between

Tubuli Recti leading to Rete Testes

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14
Q

What connects the rete testis to the head of the epididymis?

A

Efferent Ductules connect the rete testis to the head of the epididymis

Absorb extra fluid from seminiferous tubules

Non-ciliated cuboidal epithelium, “scalloped appearance”

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15
Q
A

Efferent Ductules

Note scalloped appearance

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16
Q

Where is sperm ejaculated from?

A

Epididymis

17
Q
A

Epididymis

Note smooth muscle, columnar cells on closeup

18
Q
A

Epididymis

19
Q

What forms the ejaculatory duct?

A

Ampulla of Ductus Deferens (Vas Deferens)

+

Duct of Seminal Vesicle

20
Q

What is the path of sperm after the efferent ductules?

A

Epididymis

Ductus Deference

Ejaculatory Duct

Urethra (Prostatic - Membranous - Penile Portion)

21
Q
A

Ductus Deferens

Inner - Longitudinal Smooth Muscle

Middle - Circular Smooth Muscle

Outer - Longitudinal Smooth Muscle

22
Q
A

Ductus (vas) Deferens

23
Q

What is the purpose of the seminal vesicles?

A

Secretes fructose for energy for sperm

Secrete prostaglandins

Secrete fibrinogen so make semen sticky

24
Q
A

Seminal Vesicle

Secretes fluid with sperm before ejaculatory duct

25
Q
A

Seminal Vesicle

26
Q
A

Prostate Gland

Note Cirps Amylaceum Concretion

27
Q
A

Prostate

Note Prostatic Concretion

28
Q

What is the purpose of the urethral glands?

A

Secrete alkaline mucoid solution into lumen to lubrican for ejaculate and neutralize uric acid left in tract after urination

29
Q

What surrounds the two cylinders of curpora cavernosa?

What is purpose of corpus spongiosum?

A

Thick tunica albuginea

Rigid, permits erection

No Tunica albuginea, spongy urethra courses through here

Does not become rigid during erection, must allow ejaculate to expel

30
Q
A

Upper 2/3 = Corpus Cavernosa

Lower 1/3 = Corpora Cavernosa

SF4 - Test 3 (12 decks)

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