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Jorge URO > Male anatomy > Flashcards

Male anatomy Flashcards

1
Q

Label the anatomy of the male reproductive tract

A
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2
Q

What is the role of the testis?

A

Sperm production
Endocrine gland - testosterone production

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3
Q

Describe the location of the testis

A

in an evagination of the peritoneum (vaginal tunic)

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4
Q

Label this diagram of the testis

A
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5
Q

What is the function of the tunica albuginea?

A

Sends in finger like projections into parenchyma of the testis
has contractile abilities
role in sperm release

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6
Q

What is the fluid in the vaginal cavity of the testis?

A

Vaginal cavity is continuous with peritoneum
Peritoneal fluid

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7
Q

Describe the components of the scrotum

A
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8
Q

Label the histology of the testis

A
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9
Q

What is the function of Leydig cells?

A

Produce testosterone

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10
Q

Describe the anatomy of the seminiferous tubules

A
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11
Q

What is the function of the epididymis?

A

One long convoluted tubule
Head and body - transport and maturation of spermatazoa (resorption of fluid and secretion of proteins)
Tail - storage of mature spermatazoa, smooth muscle contracts during sexual stimulation to move spermatozoa into ductus deferens

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12
Q

What is the function of the ductus deferens?

A

transports sperm up to pelvic urethra from tail of epididymis

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13
Q

What adaptation of the ductus deferens aids its function?

A

very strong smooth muscle wall aids propulsion of spermatozoa

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14
Q

Label the male reproductive tract

A
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15
Q

Label the superficial layer of canine abdominal muscles

A
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16
Q

What is the anatomy and function of the cremaster muscle?

A

Crescent shaped
Used for elevating testis

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17
Q

Label the spermatic cord

A
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18
Q

Describe the function of the pampiniform plexus

A
  • no difference in systolic and diastolic pressure
  • heat exchange
  • testosterone transfer from testicular vain to artery -> high local conc in testis
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19
Q

Which muscles aid temp regulation in the testis?

A

Tunica dartos (smooth muscle in scrotal skin) - long lasting contraction, brings testes into a warm surrounding
Cremaster muscle (striated muscle in spermatic cord) - short term elevation of testes

20
Q

What are the testicular arteries and veins?

A
21
Q

Label the vascular supply to the testes

A
22
Q

Which nerve provides innervation of the penis?

A

Terminal branch of pudendal nerve

23
Q

Which artery supplies the accessory glands, urethra and penis?

A

Internal pudendal artery

24
Q

What is the function of the male accessory reproductive glands?

A

Produce seminal plasma

25
Q

What are the male accessory reproductive glands?

A

Ampulla
Vesicular gland
Prostate gland
Bulbourethral gland

26
Q

Label the accessory glands (and other relevant structures) of the stallion

A
27
Q

What is the colliculus seminalis?

A
28
Q

Label the accessory glands and relevant structures of the bull

A
29
Q

Label the accessory glands and relevant structures of the boar(ignore middle)

A
30
Q

Label the accessory glands and relevant structures of the dog

A
31
Q

Fill in the table of the presence of reproductive accessory glands in different species

A
32
Q

What is the unique anatomy of the canine prostate gland?

A

bilobed

33
Q

What is benign prostatic hyperplasia in the dog?

A

overgrowth of prostrate ->compression of the rectum -> tenesmus (straining even if don’t need to poo)

34
Q

What are the common muscles of the male reproductive tract and their locations, anatomy and function?

A

Urethralis muscle - surrounds the pelvic urethra
Bulbospongiosus muscle - surrounds the bulbourethral glands and penile urethra
Both striated and important for transport of semen through the urethra

35
Q

What is the anatomy, location and function of the ischiocavernosus muscle?

A

Striated
Encloses crura penis
Important for erection

36
Q

Where is the crura/root of the penis attached?

A

Paired
attached to ischiatic arch

37
Q

Describe the 3 columns of erectile tissue

A

2x corpus cavernosum
- basis of the crura
- surrounded by dense connective tissue (tunica albuginea)
Corpus spongiosum
- around urethra

38
Q

Label the erectile tissue of the penis

A
38
Q

What are the 2 types of penis?

A

Fibroelastic
Musculocavernous

39
Q

Describe the anatomy of the fibroelastic penis

A
  • much fibroelastic tissue in corpus cavernosum
  • little increase in length/girth in erection
  • retractor penis muscle relaxes
  • sigmoid flexure stretches
  • ruminants, pigs
40
Q

Label the features of the fibroelastic penis

A
41
Q

Describe the musculocavernous penis

A
  • more muscular/less connective tissue in corpus cavernosum
  • significant increase in length/girth during erection
42
Q

What is the glans penis?

A

Contains the opening of the urethra
Supported only by corpus spongiosum (+os penis in dog)
Lots of species variation

43
Q

Label this ram penis

A
44
Q
A

Jorge URO (105 decks)

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