lecture 36: Male Repro Flashcards
what is this zebra showing
Flehmen response (equine)
what is this moose showing
Flehmen response (ruminant)
Identify the following:
IcM –
RPM –
SP –
T –
IcM – cavernosus muscle
RPM – retractor penile muscle
SP – penile shaft
T – testis
Identify the following:
A –
BP –
CM –
DD –
GP –
A – ampulla
BP – prostate gland
CM – cremaster muscle
DO – ductus deferens
GP – glans penis
identify the following
UB –
UM –
VG -
UB – Urinary bladder
UM – urethra
VG - Seminal Vesicle gland
Male sex cells are produced by the __________
testicles
where are the male sex cells contained (in some mammals)
contained in scrotum
why is the scrotum important for the male sex cells (sperm)
its an external sac that holds the testicles outside the body to keep sperm 4-5 degrees COOLER than body temp
the primary male organ of repoduction
testicles
what are the 2 main jobs of the testicles
make sperm
secrete testosterone
of these 3 species, which has the LONGEST sperm relative to body weight
house mouse
what are the 2 important tubes transferring sperm cells
*ductus deferens
*urethra
ductus deferns
slender tube from epididymus to urethra which moves sperm to the urethra at ejaculation
ductus deferens
long tube from bladder to penis; passageway for urine and sperm out of the body
urethra
Ungulate(hooved) penis types:
what species has the musculocavernous type
equine
Ungulate penis types:
what species has the fibroelastic type
bovine
caprine
ovine
male organ of copulation which conveys semen and urine out of body
penis
allows extension and retraction of the penis; sigmoid flexure extends in copulation
penis retractor muscle
common site for urethral calculi
- Sigmoid flexure
what must relax to expose the penis for examination or treatment
Retractor penis muscle
1- Sigmoid flexure
2- Retractor penis muscle
3- Preputial skin
Identify A,B,C,D
a persistent frenulum that should have broken down naturally around the time of birth
this is a urethral process of what animal
urethral process of the bull
this is a urethral process of what animal
urethral process of the ram (ovine)
should an animal with a persistent frenulum be bred?
If necessary either of these can be removed surgically, but an animal with a persistent frenulum should not be used for breeding purposes.
Descent of the Testicles:
Fetal development begins within the ________caudal to the_______
abdomen
kidneys
Descent of the Testicles:
The testicles are located ______ between the peritoneum and the body wall.
retroperitoneally
Descent of the Testicles:
Initially the ________ passes ventrally through the inguinal canal into the scrotum. It is followed by the ___________
gubernaculum
testicle and epididymis
Descent of the Testicles:
As the testicle moves through the inguinal canal it picks up the ________ and the fascial layers of the inner and outer _______ wall
parietal peritoneum
abdominal
As the testicle moves through the inguinal canal it picks up the parietal peritoneum and the fascial layers of the inner and outer abdominal wall.
These become the _________once outside of the abdomen.
vaginal tunic
an opening in the caudal part of the abdominal wall that is a potential space between the flesh of the
internal abdominal oblique and the aponeurosis of
the external abdominal oblique
Inguinal Canal
The deep inguinal ring is found at the free edge of
the ____________
internal abdominal oblique
The superficial inguinal ring lies between the
pelvic and abdominal tendons of the _____________
external abdominal oblique aponeurosis
1- Testis
2- Gubernaculum
3- Vaginal Process
4- Testicular artery
a jelly-like cord stretching from the testicle to the tail of the epididymis, and then into the inguinal canal
gubernaculum
gubernaculum becomes the ________
scrotal ligament
what does this depict
Movement of testis from
peritoneal cavity into the scrotum
Timing of testicular descent:
Horse
10-14 days before or after parturition
Timing of testicular descent:
Ruminants and pigs
before parturition
Timing of testicular descent:
Carnivores
slightly after parturition
identify the glands
identify 1,2,4
- 1- Testis
- 2- Head of the epididymis-
- 2`- Body
- 2``- Tail
- 4- Deferent duct
How do spermatozoa mature in the epididymus
Spermatozoa mature into
mature sperm in the head and body. (Head not shown
here, but should be opposite of the tail)
continuation of the epididymis for
transportation of sperm
Deferent duct
Coil of testicular veins around the testicular artery, drawing heat away from the artery
to cool blood before reaching the testicle
Pampiniform plexus
The serosal fold connecting the visceral and parietal vaginal tunics
Mesorchium
identify 5-8
5- Pampiniform plexus
6- Mesorchium
7- Proper ligament of the testis
8- Ligament of the tail of the epididymis
what are the 4 main functions of the epididymus
- passageway for sperm out of the seminiferous tubules
2.store sperm
3.fluid secretion to nourish sperm
4.place for sperm maturation
- 1- Head of the epididymis
- 2- Body of the epididymis
- 3- Pampiniform plexus
what adds fructose and citric acid to nourish the sperm
seminal vesicles (accessory glands)
what gland is located at the neck of the bladder
prostate gland
what 4 things does the prostate gland (accessory gland) do
- cleans the urethra prior to and during ejaculation
- provides minerals for sperm
- provides medium for sperm transport
- provide the characteristic odor of semen
In general, these glands are
associated with the urethra and add the liquid portion of the ejaculate
Accessory Sex Gland
T/F During a breeding
soundness exam in cattle
and horses the accessory
sex glands may be palpated
rectally
true
what should we assess accessory glands for when palpating
symmetry, and should not be overly sensitive when palpated
make sure to palpate ALL accessory glands
what accessory glands do horses have
what accessory glands do ruminants have
what accessory glands do pigs have
what accessory glands do dogs have
what accessory glands do cats have
what is the other name for the bulbourethral gland
Cowper’s gland
T/F bulbourethral gland (cowpers) is a paired organ
true
what is the purpose of bulbourethral gland (cowpers)
cleans urethra prior to semen passage
T/F bovines have a cartilaginous penis
true
what is the route the sperm travels out of the body
testicle
epididymus
ductus deferns
urethra
glans penis
Identify A and B
A) vesicular gland
B) bulbourethral gland