Exam 3: Lecture 37 - Ruminant Male Reproductive system Flashcards by Olivia Fraser

Q

What is being shown here?

A

-Flehman response

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Q

What is the Fehman response?

A

-Trying to get scent of female into olfactory system to determine if they are in heat or not

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Q

What is c?

A

-Testicular a. & v.

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Q

What is d?

A

-Vaginal ring

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Q

What is e?

A

-Ductus deferens

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Q

What is 6?

A

-Bulbospongiosus m. at bulb of penis

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Q

What is 7?

A

-Ischiocavernosus m. & crus penis

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Q

What is 8?

A

-Retractor penis m.

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Q

What is 9?

A

-Superficial inguinal ln

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Q

What type of penis do ruminants have?

A

-Fibrocartilaginous penis

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Q

What structure does the ruminant penis have that differs from other species comparatively?

A

-Sigmoid flexure

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Q

What is the sigmoid flexure?

A

-“S” shaped curve that allows the penis to be retracted into the body & protected (straightens out during erection)

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Q

What happens to the penis when there is no parasympathetic response?

A

-Retractor penis m. will pull penis back into sigmoid shape (b/c not excited)

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Q

What happens to the penis when there is a parasympathetic response?

A

-Retractor penis m. will relax causing the penis to extend beyond the end of the prepuce

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Q

Parasympathetic response does that to the penis?

A

-Causes erection

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Q

What response is ejaculation?

A

-Sympathetic (remember as aww poor guy finished too quick)

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Q

Why are the testes located in the scrotum in mammals?

A

-To maintain temperature
-Need a slightly cooler temperature for spermatogenesis to occur

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Q

What is indicated by the star?

A

-Ampulla

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Q

What is indicated by the star?

A

-Prostate gland

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Q

What is indicated by the star?

A

-Cremaster muscle

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Q

What is indicated by the star?

A

-Ductus deferens

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Q

What is indicated by the star?

A

-Glans penis

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Q

What is indicated by the star?

A

-Ischiocavernosus m.

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Q

What is indicated by the star?

Study These Flashcards

A

-Retractor penile m.

What is indicated by the star?

-Penile shaft

What is indicated by the star?

-Urinary bladder

What is indicated by the star?

-Seminal Vesicle gland

What is indicated by the star?

-Testis

What is indicated by the star?

-Urethra

Where is the prostate gland typically located?

-Tends to be around the urethra beyond or distal to the bladder (across broader species)

The ischiocavernosus m. is located

-At the base of the penis

What is the route of ejaculation?

Semen exit to Ductus deferens -> ampulla -> urethra -> bulbourethral gland -> prostate gland -> out the penis

What is important about sperm moving through the reproductive system before exiting as ejaculate?

-It picks up additional fluids to help protect it from the vagina (vagina designed to keep things out)

What is indicated by the blue arrow?

-Head of the epididymis

What is indicated by the blue arrow?

-Tail of the epididymis

What is the male sex cell and where is it made?

-Sperm -Made from testis

What is the female sex cell and where is it made?

-Ovum -Made from ovary

Where is the male sex cell contained?

-Contained in scrotum

What is the scrotum & what does it do?

-External sac that hold testicles outside of body to keep sperm at 4-5 degrees cooler than body temp. (b/c spermatogenesis won't occur if testis too warm)

What are the testicles & what do they do?

-Primary male organs of reproduction -To produce sperm -To secrete testosterone

What is the ductus deferens and its function?

-Slender tube from epididymis to urethra which moves sperm to the urethra at ejaculation

What is the urethra?

-Long tube from bladder to penis -Passageway for urine and sperm out of the body

What is the penis type of equines compared to bovines?

-Equines = musculocavernous type -Bovine, caprine, ovine = fibroelastic type

What is the penis?

-Male organ of copulation which conveys semen & urine out of the body

What is the penis retractor m.?

-Allows extension & retraction of the penis -Sigmoid flexure extends in copulation

What is indicated by the blue star?

-Retractor penis m.

What is indicated by the blue star?

-Preputial skin

What is D?

-Raphe of penis

What is C?

-Urethral process

What is B?

-External urethral orifice

What is A?

-Glans penis

What is E?

-Fascia of penis

What is F?

-Tunica albugenia

What is J?

-Corpus cavernosum

What is K?

-Corpus spongiosum & urethra

What is shown here?

-Frenulum -Should be broken down naturally around time of birth

Describe the descent of the testis

-Fetal development begins with testicles located retroperitoneally between peritoneum & body wall -Initially the gubernaculum passes ventrally through inguinal canal into scrotum (followed by testicle & epididymis) -As testicle moves through inguinal canal it picks up the parietal peritoneum & fascial layers of inner & outer abdominal wall -These become the vaginal tunic once outside of abdomen