1. Thin 2. Pigmented 3. Covered with few hairs

1. Scrotal skin 2. Tunica dartos 3. Scrotal septum 4. External spermatic fascia 5. Vaginal tunic (parietal and visceral layers) 6. Tunica albuginea

Male Repro Tract Flashcards by Kelsey Madden

Scrotum is located?

Between thighs in inguinal region

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Scrotum is?

Pouch of skin divided by median septum into 2 compartments

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2 layers of scrotum

Skin

2. Tunica dartos

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Skin of scrotum

Thin
Pigmented
Covered with few hairs

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Tunica dartos

Smooth muscle layer of scrotum

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Tunica dartos function

Contraction causes scrotal skin to retract and draw testes toward body

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Scrotal ligament connects

Tunica dartos to ligament of tail of epididymis

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Scrotum location in cat

Just ventral to anus

2. Lies dorsally on short, caudally directed penis

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Each scrotal compartment contains?

Testis
Epididymis
Distal part of spermatic cord

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Scrotal raph

External mark of scrotal septum

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Which testis is usually farther caudal?

Left

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Testes are located in the scrotum obliquely with long axis running?

Dorsocaudally

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Testes are enclosed in?

Tunica vaginalis

2. Spermatic and cremasteric fascia

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What connect testes to tunica dartos?

Spermatic and cremasteric fascia

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Epididymis is attached to what surface of the testis?

Dorsolateral surface

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The head of the epididymis is at which extremity of the testis?

Cranial

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The tail of the epididymis is at which extremity of the testis?

Caudal

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External spermatic fascia derives from?

External abdominal oblique

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Internal spermatic fascia derives from?

Transversalis fascia system

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Layers of testes

Scrotal skin
Tunica dartos
Scrotal septum
External spermatic fascia
Vaginal tunic (parietal and visceral layers)
Tunica albuginea

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Proper ligament of the testis connects?

Testis to tail of epididymis

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3 attachments of the testes

Proper lig. of the testis
Lig. of the tail of the epididymis
Scrotal lig.

(continuous)

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Lig. of the tail of the epididymis attaches?

Tail of epidiymis → vaginal tunic and spermatic fascia

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Scrotal ligament attaches?

Tunica dartos → lig. of tail of epididymis

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2 remnants of embyronic gubernaculum testis

1. Proper lig. of testis | 2. Lig. of tail of epididymis

Function of epididymis

Stores sperm before ejaculation

3 parts of epididymis

1. Head (caput) 2. Body (corpus) 3. Tail (cauda epididymis)

Head of epididymis location

Begins on cr. medial surface of testis → immediately twists toward lateral side

Body of epididymis location

Runs along dorsolateral surface of testis

Epididymis continues craniodorsally as?

Ductus deferens

Medial edge of epidydmis is attached to testis by?

Mesorchium (visceral vaginal tunic)

Testicular bursa formed by?

Mesorchium (limited cranially and caudally by epididymis)

Ductus deferens enters the abdominal cavity at the?

Vaginal ring

Right and left ducts of ductus deferens enter?

Genital fold

Main blood supply to testis and epididymis

1. Testicular a. | 2. A. of ductus deferens

Pampiniform plexus

Formed by testicular v.

Anatomical spermatic cord contains? (7)

1. Ductus deferens (and its vessels) 2. Mesoductus deferens 3. Testicular a. 4. Testicular vv. (pampiniform plexus) 5. Lymphatics of testis and epididymis 6. Testicular nerve plexus 7. Mesorchium

Surgical spermatic cord contains?

Anatomical spermatic cord + 1. Cremaster m. 2. Parietal vaginal tunic

Spermatic cord begins where?

Vaginal ring

When does spermatic cord pass through inguinal canal?

During descent of testis

Prostate completely surrounds?

Urethra at neck of bladder

Which surface of prostate is covered by peritoneum?

Dorsal surface

Which surface of prostate is retroperitoneal?

Ventral surface

Prostate borders

Dorsal: rectum Ventral: pubis symphysis and ventral abdominal wall

How is prostate divided into right and left lobes?

By median septum

2 ductus deferents enter what surface of the prostate?

Craniodorsal

Where do ductus deferens open into the urethra?

Colliculus seminalis

Colliculus seminalis location

2 slits on each side of hillock

3 divisions of penis

1. Root 2. Body 3. Glans

Root of penis contains what parts?

1. Left and right crura | 2. Bulb of penis

Most important component of the body of the penis

2 adjacent corpora cavernosa

Glans of penis contains what 2 parts?

1. Bulbus glandis | 2. Pars longa glandis

Penis in non-erect state

Glans entirely withdrawn into prepuce

Crus of the penis is?

Proximal end of corpus cavernosum penis

Crus of penis originates from?

Ischiatic tuberosity

Crus of penis is surrounded by?

Ischiocavernosus m.

Bulb of penis location

Between crura

Bulb of penis is partially bilobed by?

Retractor penis m.

Bulb of penis is continuous with?

Corpus spongiosum surrounding caudal part of urethra

Bulb of penis is externally covered by?

Bulbospongiosus m.

Where does body of penis begin?

Where 2 crura join distal to bulb

Body of penis contains?

1. Corpus cavernosa 2. Corpus spongiosus 3. Urethra

Body of penis is enveloped by?

Tunica albuginea

Urerthra is located in?

Corpus spongiosus

Os penis is surrounded by?

Gland penis

Os penis is?

Boner bone in dog

Bulbus glandis is?

Barrel-shaped cavernous expansion of corpus spongiosum

Bulbus glandis surrounds?

Proximal third of os penis

Bulbus glandis in non-erect stage

Not distinct

Bulbus glandis function

Provide "tie" during copulation

How is bulbus glandis separated from pars longa glandis?

CT septum

Connection between pars longa glandis and corpus spongiosum

None

How is pars longa glandis drained?

By short large vein on each side → into cavernous bulbus glandis

Os penis is the ossification of?

Corpora cavernosa

Prepuce is?

Fold of skin which covers glans of penis in retracted state

4 parts of prepuce

1. External lamina 2. Internal lamina 3. Preputial orifice 4. Preputial fornix

External lamina of prepuce

Haired skin of outer surface → continuous with skin of abdominal wall

Internal lamina of prepuce

In contact with penis → terminates at fornix

Preputial orifice

Where external and internal lamina meet

Preputial fornix

Internal lamina reflect onto glans penis

Ischiocavernosus m. originates from?

Ischiatic tuberosity

Ischiocavernosus m. encloses?

Crura

Bulbospongiosus m. surrounds?

Bulb of penis

Bulbospongiosus m. arises from?

External anal sphincter

Retract penis m. is what type of muscle?

Smooth muscle

Retractor penis m. arises from?

1st 2 caudal vertebrae

Ischiourethralis m. originates from?

Ischiatic tuberosity

Ischiourethralis m. inserts?

Into fibrous ring that encircle dorsal vein of penis

A. of bulb of penis runs in?

Corpus spongiosum

Deep a. of penis runs in?

Corpus cavernosum

2 branches of dorsal a. of penis

1. Preputial branch | 2. Deep branch