lab practicum 2 Flashcards
What are the three parts of the penis?
root, shaft and glans penis
What two parts are the penis formed by?
corpus cavernosum and corpus spongiosum
What type of penis increases in length during erection?
fibroelastic penis
What penis type increases in width during an erection?
musculovascular penis
What muscle maintains the S-shape of the penis?
the retractor penis muscle
What are the two compartments of the parenchyma?
the interstitial compartment and the tubule compartment
What cells produce testosterone?
leydig cells
Where are sperm cells developed?
the seminiferous tubules
T/F: You can see the seminiferous tubules with your naked eye
F
What maintains the integrity of the rete tubules?
mediastinum
T/F: The epididymis lies adjacent to the testis and is not apart of the testis
T
Where do sperm first go once leaving the testicle?
the caput epididymis
In what portion of the epididymis do spermatozoa gain protection factors?
the corpus epidiymis
What portion of the epididymis is sperm that is eligible for ejaculation stored in?
the cauda
What is seen in the lumen of the epididymis on histology slides?
sperm
What connects the cauda epididymis to the ampulla and is responsible for transporting sperm?
the vas deferens
What is the striated muscle supporting the testis?
the cremaster muscle
What is responsible for temperature regulation and blood supply within the testis?
the pampiniform plexus
What type of epithelium lines the vas deferens?
pseudostratified columnar epithelium
What provides the pathway to and from the body for testicular vasculature, lymphatics, and nerves?
the spermatic cord
What species does not have an enlargement of the vas deferens?
boar
Which portion of the prostate is outside of the urethralis muscle?
the body
What gland is responsible for cleaning out the pelvic urethra before ejaculation?
the Cowper’s gland
What gland secretes a significant portion of the fluid that becomes semen and is alkaline?
seminal vesicles
What species does not have a disseminate prostate?
stallion
Secretions of GnRH come from the
hypothamalus
What gonadotropins are secreted from the AP?
LH and FSH
What gonadal steroid hormone do males produce?
Testosterone and Estrogen
What center discharges GnRH from the hypothalamus in frequent, intermittent bursts that occur throughout the day and night?
tonic center
Leydig cells contain the ____ receptor, while Sertoli cells contain the ___ receptor
LH, FSH
Spermatogenesis takes place in the
seminiferous tubules
What are the three phases of spermatogenesis?
proliferation, meiosis, and differentiation
Developing germ cells are connected by
intercellular bridges
Spermatogenesis consists of
the sum of all cellular transformations in developing germ cells that occur in the seminiferous epithelium
During which phase of spermatogenesis are there no more cell divisions?
the differentiation phase
No further cell divisions take place in this phase
the differentiation phase
Which compartment does the differentiation phase take place in?
the Adluminal compartment
What is the role of a spermatozoon?
to deliver the male’s genetic material to an oocyte during fertilization
What are the phases that occur within the differentiation phase?
the golgi phase, cap phase, acrosomal phase, and maturation phase
During which phase does the acrosomic vesicle form?
the golgi phase
What parts make up the spermatozoa?
the head and tail
The head consists of the
the nucleus, acrosome, and post-nuclear cap
The tail consists of the
the middle piece, principal piece, and terminal piece
Which phase do portions of the manchette migrate towards the tail and begin to disappear, while portions of it remain to form the postnuclear cap?
the maturation phase
What allows the release of enzymes that are packaged in the sperm to digest or penetrate the zona pellucida
the acrosome reaction
What is the role of the seminiferous tubule?
to produce spermatozoa
Can you see the seminiferous tubule with your naked eyes?
no
What cells are located in the seminiferous tubules that support sperm cells as they are maturing?
Sertoli cells
In the bull, how long does it take for the seminiferous epithelium to get from stage 5 to stage 8?
13.5 days
Daily sperm production is dependent, at least in part, on the number of ____ cells populating the testis
Sertoli cells
What orientation is a bull’s testis?
vertical
Which portion of the scrotum is heavily populated with sweat glands?
scrotal skin
T/F: The scrotal fascia is the fatty, membranous layer of the scrotum
T
Which portion of the testicle is the functional aspect where sperm cells and testosterone are developed?
Testicular parenchyma
Which portion of the male repro tract carries sperm up into the male’s body cavity?
Vas Deferens
T/F: The tubule compartment of the parenchyma is where leydig cells are found
F
Where are sperm cells developed in the male’s repro tract (specific)?
seminiferous tubules
Which cells provide support to developing germ cells and form the blood-testis barrier?
sertoli cells
what portion of the male’s repro tract do sperm first enter after leaving the testicle (specific)?
caput epididymis
T/F: sperm undergo morphological changes and gain protection factors in the corpus epididymis
T
where is spermatozoa that is eligible for ejaculation stored?
cauda epididymis
What is the most distal part of the epididymis?
Caudal Epididymis
What is the most distal part of the epididymis?
Caudal Epididymis
What cells would be found at the center (lumen)?
Sperm
What cell(s) is indicated by the arrow?
What cell(s) is indicated by the arrow?
leydig cells
Which aspects of the male assist with thermoregulation?
Scrotum, Cremaster Muscle, Pampiniform Plexus
Which aspects of the male assist with thermoregulation?
Scrotum, Cremaster Muscle, Pampiniform Plexus
Which of these makes up part of the scrotal Skin?
A. Tunica vaginalis
B. Tunica Dartos
C. Tunica albuginea
D. Cremaster muscle
B. Tunica Dartos
Which of these makes up part of the scrotal Skin?
A. Tunica vaginalis
B. Tunica Dartos
C. Tunica albuginea
D. Cremaster muscle
B. Tunica Dartos
In which species does the male not have an ampulla?
A. Bovine
B. Ovine
C. Porcine
D. Equine
C. Porcine
True/False: The parenchyma is the most inner portion of the testes
A. True
B. False
A. True
What makes up the excurrent duct system?
A. Efferent ducts
B. Epididymis
C. Vas deferens
D. All of the above
D. All of the above
In which part of the epididymis do sperm get forward motility?
A. Cauda
B. Caput
C. Corpus
D. None of the above
A. Cauda
What part of the sperm are primary abnormalities associated with?
A. Head
B. Tail
C. Midpiece
D. plasma
A. Head
True/False: This picture contains both primary and secondary abnormalities?
A. True
B. False
A. True
Which tissue type does humans and stallions have?
A. Fibroelastic
B. Musculovascular
B. Musculovascular
Which muscle maintains the sigmoid flexure in a fibroelastic penis?
A. Retractor penis muscle
B. Ischiocavernosus muscle
C. Pelvic urethral muscle
D. Bulbospongiosus muscle
A. Retractor penis muscle
What part of the male reproductive tract is seen below?
A. Vas deferens
B. Epididymis
C. Ampulla
D. Seminiferous tubule
A. Vas deferens
True/False: This is a primary abnormality
A. True
B. False
false
In which species does the male have a very large glans penis?
A. Bovine
B. Equine
C. Porcine
D. Ovine
Is this a primary or secondary abnormality?
A. Primary
B. Secondary
C. Neither
A. Primary
Where do primary abnormalities arise?
A. Testes
B. Epididymis
C. Vas deferens
D. Penis
What is the name of the paired glands indicated by the Blue arrows?
Seminal Vesicles
What do seminal vesicles produce in the bull?
seminal plasma
What is the name of the glandular structure indicated by the yellow box?
Prostate
What is the name of the “enlarged tubules” indicated by the Green arrows?
Ampulla
What are the ampulla’s an enlargement of?
the Vas Deferens
What species does not have ampulla’s?
boar
Name the pair of muscles indicated by the Orange arrow
ischiocavernosus muscles
What role do the ischiocavernosus muscles play in the process of erection in the Bull? (Be specific)
Clamp down on the hip bone to prevent back flow of blood.
What is the name of the region/structure indicated by the Orange arrows?
Glans Penis
What is the name of the region/structure indicated by the Orange arrows?
Glans Penis
What is the glans penis the homologous of in females?
the clitoris
Name the pair of muscles indicated by the Blue arrow.
Retractor penis muscles
What is the role of the retractor penis muscles play in the process of erection in the bull?
Straighten or relax during erection
Name the tough, white connective tissue indicated by the Orange arrow.
Tunica Albuginea
Name the cavernous tissue indicated by the Green circles.
Corpus Cavernous
What is the name of the glandular structure indicated by the Yellow circle?
Cowper’s Gland
Name the muscles indicated by the Green arrow
bulbospongiosus muscle
What role does the bulbospongiosus muscle play in the process of erection in the Bull?
Pushes semen down the penial urethra
What is the layer of the scrotum indicated by the Green arrow?
Scrotal Skin
What is significant in the scrotal skin that aids in the thermal regulation of the testis?
Sweat glands, Thermoreceptors, Hair
What is the name of the smooth muscle intertwined within the loose connective tissue indicated by the Purple arrow?
Tunica Dartos
What is the tunica dartos’ major function?
Raise and lower testes in response to thermo changes
Can the tunica dartos sustain muscle contractions for a long period of time?
yes
Name the S-shaped configuration of the fibroelastic penis indicated by the Red line
Sigmoid Flexure
What is the purpose of the sigmoid flexure?
Keep the penis housed inside the male
What is the name of the tough, white connective tissue covering the parenchyma tissue of the testes indicated by the Blue arrow?
Tunica Albuginea
What is the name of the convoluted structure on the surface of the testis indicated by the yellow arrow?
Testicular blood supply
What is the name of the region/segment of the structure attached to the side of the testis indicated by the red circle?
Cauda epididymis
What maturation factor is added in the cauda epididymis?
Forward moving motility
What is the name of the intertwined “vascular” area indicated by the Blue arrow?
Pampiniform plexus
What is the name of the striated muscle indicated by the Green arrow?
Cremaster muscle
Can the cremaster muscle sustain contractions for a long period of time?
no
Identify the region of the testis indicated by the gray arrow.
Parenchyme
What type of abnormality does the sperm cell have indicated by the yellow circle?
Primary
Where do primary abnormalities arise?
Testis
What type of abnormality does the sperm cell have indicated by the yellow circle?
Secondary
Where do secondary abnormalities arise?
epididymis
This was from a 3 year old boar with known problems in semen quality. What would you suggest we do with him?
Cull or wait another 60 days to re-test
Name the species based on the pelvic tract.
Boar
what are the four majors layer of the scrotum?
- Scrotal skin: heavily populated with sweat
glands - Tunica dartos: mesh-like smooth muscle
layer just beneath the scrotal skin - Scrotal fascia: fatty and membranous
layers - Parietal vaginal tunic: first peritoneum
layer taken into scrotum
The scrotum is a two-lobed pouch that houses the testes and functions to:
- Serves as a physical barrier to the environment
- Regulate temperature of the testes
The __________________ is the second peritoneum layer within the scrotum
visceral vaginal tunic
The ____________________ contains smooth muscle fibers in addition to connective tissue
tunica albuginea
What makes up the testicular capsule?
the visceral vaginal tunic and the tunica albuginea
What are the two compartments of the parenchyma?
the interstitial compartment and the tubule compartment
What is located in the interstitial compartment?
• Leydig cells: produce testosterone
• Capillaries, lymphatic vessels, and connective tissue
what is located in the tubule compartment?
• Seminiferous tubules: highly convoluted tubules network
• Sertoli cell: provides support to developing germ cells and form the blood-testis barrier
Label the image
A. bulb of penile urethra
B. bulbospongiousus muscle
Label the image
A. cowper’s gland
B. bulbospongiosus muscle
C. retractor penis muscle
Label the image
A. cowper’s glands
B. ischiocavernosus muscle
Label the image
A. vas deferens
B. urinary bladder
C. ampulla
D. seminal vesicles
E. body of the prostate
F. pelvic urethral muscle
G. ischiocavernosus muscle
H. bulbospongiosus muscle
Label the image
A/I. VG
B. BP
C. ischiocavernosus muscle
D. ampullas
E. UB
F. UM
G. CP
H. vas deferens
J. sigmoid flexure
K. retractor penis muscle
L. glans penis
M/P. cremaster muscle
N. PS
O. SC
Q. TE
Label the image
A. corpus cavernosum
B. tunica albuginea
C. corpus spongiosum
D. penile urethra
Label the image
A. corpus spongiosum
B. corpus cavernosum
C. tunica albuginea
D. T
E. urethra
F. bulbospongiosus muscle
G. retractor penis muscle
label this image
A. tunica albuginea
B. DEC
C. corpus cavernosum
D. urethra
E. corpus spongiosum
A. corpus cavernosum
B. urethra
C. corpus spongiosum
A. colliculus seminalis
B/D. seminal vesicles
C. vas deferens
A. pelvic urethral muscle
B. colliculus seminalis
what is the colliculus seminalis?
Where Urethra, Vas Deferens, Seminal Vesicles and Body of Prostate Empty
A. bulbospongiosus muscle
B. cowper’s gland
A. prostatic gland
A. prostatic gland
B. fibromuscular stroma
what is the prostate gland
- A walnut-sized glands that surrounds the initial segment of the urethra muscle
- The epithelium of the prostate produces a fluid rich in citric acid and proteolytic enzymes that nourish and prevent the coagulation of sperm
- pseudostratified columnar epithelium cells line the lumen of the gland
A. disseminated prostate
B. body of the prostate
A. body of the prostate
B. pelvic urethral muscle
A. disseminate prostate
B. pelvic urethral muscle
A. blood vessel
B. mucosal fold
C. simple columnar epithelium
D. lumen
A. smooth muscle
B. epithelium
C. lumen
D. mucosal fold
A. lumen
B. smooth muscle
A. smooth muscle
B. lumen
A. vas deferens
B. ampulla
C. seminal vesicles
What species does this repro tract come form?
bull
What species does this repro tract come form?
stallion
A/G. seminal vesicles
B. vas deferens
C. prostate
D/F. cowper’s glands
E. pelvic urethral muscle
H. retractor penis muscle
I. bulbospongiosus muscle