Flashcards in Histo - Male Urogenital System Deck (74):
List the 7 main structures of the male genital system.
-Accessory sex glands
List the 4 accessory sex glands of the male genital system.
-Ampulla of ductus deferens
The dense, irregular CT capsule of the testes.
The tunica albuginea is composed of what 3 things?
The tunica albuginea is covered by the ___.
Visceral vaginal tunic (tunica vaginalis)
The interior surface of the tunica albuginea has a ___ formed by ___.
-Branches of testicular a & v
The CT trabeculae extending inward from the tunica albuginea, that divides the testicular parenchyma into testicular lobules.
Each lobule formed by the septuli testes contains 1-4 ___.
The septuli testes is continuous with the ___, which is a CT area containing the ___ & blood vessels.
The mediastinum testes is well developed in what 3 species? Poorly developed in which species?
-Ruminants, Pigs, & Dogs
The seminiferous tubules are responsible for ___.
What are the 2 portions of the seminiferous tubule?
-Tubuli contorti (convoluted portion)
-Tubuli recti (straight portion)
List the 3 components of the seminiferous tubules?
The seminiferous tubules are surrounded by ___ which contain ___ cells.
The peritubular cells of the lamina propria of the seminiferous tubule are responsible for ___.
Sustentacular (sertoli) cells are elongated ___ cells, whose base adheres to the ___ and whose apex extends into the ___.
-Lumen of seminiferous tubules
The blood-testes barrier is formed by what 2 things?
-Sustentacular (sertoli) cells
List the 7 functions the sustentacular (sertoli) cells perform for sperm cells.
-Produce Mullerian inhibitory hormone (MIH)
-Secrete Intratubular fluid
-Form blood-testes barrier
What 2 cell types are phagocytosed by sustentacular cells?
-Degenerating spermatogenic cells
-Detached residual body of spermatids
What does Mullerian inhibitory hormone (MIH) inhibit?
Production of female duct
What is intratubular fluid used for?
List the 5 types of spermatogenic cells.
Where are spermatogenic cells found?
Between & above the sustentacular cells
Spermatogonia cells are situated next to the ___ and are relatively ___.
Primary spermatocytes are the ___ cells and are characterized by ___.
-Obvious condensed chromosomes
Secondary spermatocytes are ___ and difficult to ___.
Spermatids are ___ cells located towards the ___.
-Small, rounded cells
-Lumen of the seminiferous tubule
Spermatozoa are formed from ___ that undergo ___.
During transformation, the heads of the spermatozoa become embedded in the ___ to gain ___.
-Sertoli (sustentacular) cells
These cells are characteristic of steroid secreting cells.
Leydig (Interstitial) cells produce ___ and are responsible for the development of ___.
-Secondary male characteristics
When do Interstitial (Leydig) cells become apparent?
List the 3 structures of the Intratesticular genital ducts.
-Straight tubules (tubuli recti)
The function of the straight tubules of the intratesticular genital ducts is to ___.
Connect the convoluted tubules to the rete testes
The rete testes are a continuation of the straight tubules, surrounded by the ___ that produce ___.
The ductuli efferentes are efferent ducts of the intratesticular genital ducts that connect the ___.
Rete testes to the ductus epididymis
The ductuli efferentes are line with ___ that can be ___ or ___.
The ciliated cells of the ductuli efferentes help to ___ while the non-ciliated cells ___.
-Absorb tubular fluid
List the movement of sperm through the testes.
Straight tubules --> Rete testes --> Ductuli efferents --> Epididymus --> Vas deferens --> Urethra
The epididymis is surrounded by the ___ and is divided into what 3 parts?
-Head, Tail, & Body
The head of the epididymus is connected to the ___, while the tail & body are continued with the ___.
Which part of the epididymus arises from the testes in most animals? Which animal is the sequence reversed?
The epithelium of the epididymus is ___, containing both ___ & ___ cells.
-Small basal cells
The columnar cells of the epididymus have long, branched, microvilli called ___.
What are the 2 functions of the epididymus?
-Sperm maturation (head & body)
-Sperm storage (tail)
The ductus deferens has no ___.
The mucosa layer of the ductus deferens is ___ with ___ epithelium, that becomes ___ toward the end of the duct.
The terminal part of the ductus deferens is ___.
What are the 3 layers of the tunica muscularis of the ductus deferens?
The ampulla of the ductus deferens is absent in ___ & ___.
The vesicular gland is absent in ___.
List the 2 parts of the prostate gland.
The body of the prostate gland is absent in ___ & ___.
The pars disseminata of the prostate gland is absent in ___.
The bulbourethral gland is absent in ___.
What 2 accessory sex glands are absent in the dog?
What 2 accessory sex glands are absent in the cat?
What accessory sex gland is absent in the pig?
The ampulla is a ___ gland lined with ___.
The vesicular gland is a ___ gland lined with ___.
The vesicular gland in a horse is a ___, and a ___ in a bull.
-True vesicle w/a wide lumen
-Compact lobulated organ
The compact part (body) of the prostate gland surrounds the ___ and the disseminate part is located in the ___.
-Propria-submucosa of the pelvic urethra
What is found in the tubules & alveoli of the prostate gland?
Concentrically laminated concretion (semi-solid excretions) of secretory material
The bulbourethral gland is a ___ gland, similar in appearance to a ___.
The secretory portion of the bulbourethral gland has ___ epithelium and shows a ___.
-Simple, tall columnar
List the 2 parts of the urethra & where they are located.
-Pelvic urethra (inside body)
-Penile urethra (outside body)
The propria submucosa of the pelvic urethra is composed of endothelium lined cavernous spaces called ___.
In the penile urethra, the cavernous spaces are greatly increased and called ___.
The tunica muscularis of the urethra is ___ muscles around the bladder & ___ muscle around the urethra.
List the 3 parts of the penis.
The corpora cavernosa is surrounded by the ___ and divided by the ___.
The corpoa spongiosum surrounds the ___.
The glans penis is highly ___ and well developed in what 2 species?
-Horses & Dogs