The Male Reproductive System. Flashcards
Define the crura?
Plural for crus.
Define erectile tissue?
Another name for the corpuscavernosum.
Define the male gonad?
Another term for the testicles.
Define spermatozoa?
Male gametes.
Define the spermatic fascia?
The fascia that surrounds the vaginal tunic.
What are the 7 organs/features that make up the male reproductive system?
Scrotum.
Testes.
Epididymus.
Deferent ducts.
Prostate gland.
Penis.
Urethra.
What is the scrotum?
A pouch of skin that is divided by a median septum into 2 cavities.
Where is the canine scrotum located?
Between the thighs and around 2 thirds of the distance from the anus to the preputial opening.
What kind of shape is the scrotum?
Spherical.
What is the first layer of the scrotum?
The integument which is pigmented and covered in fine hairs.
What is found within the integument?
It contains well developed sebaceous and tubular glands and it also contains a deep layer of smooth muscle.
What is the layer of smooth muscle in the integument known as?
The dartos.
What is the function of the dartos?
To contract and draw the testes closer to the body.
What is the male gonad or testes?
2 oval structures that are located in the scrotum.
What is the outmermost covering that covers the testes?
An outer membrane known as the visceral vaginal tunic.
What layer is found below the visceral vaginal tunic?
The tunica albuginea.
What is the tunica albuginea?
A dense, white fibrous capsule that makes up the surface of the testicles.
What is found within the testes?
Many coiled tubes called the seminiferous tubules.
What are the 2 types of cells that are found within the seminefrous tubules?
Spermatazoa.
Sertoli cells.
What are the spermatozoa that are found in the testes?
Male gametes which can be used to fertilise a female egg cell.
What are the sertoli cells that are found in the testes?
Specialised cells that support to the sperm cells.
Where will all of the seminferous tubules within the testes combine?
At a large collecting duct called the rete testis.
What is the structure of the rete testis?
A myriad of tubules that flow through the efferent ductules into a structure the head of the epididymus.
Is the epididymus inside or outside of the testes?
Technically it is outside of the testes as it lies above the tunica vaginalis.
What is the main function of the epididymus?
To connect the testes to the vas deferens.
What are the 3 areas of the epididymus?
Head.
Body.
Tail.
Where is the head of the epididymus located?
It is the area that is located closest to the efferent ductules.
Where will sperm enter the epididymus?
At the head.
Where is the body of the epididymus?
It lies between the head and tail.
What structure does the tail of the epididymus come into contact with?
The vas deferens.
Where is the tail of the epididymus located?
It is located at the caudal end of the testes.
Where in relation to the testes is the head of the epididymus located?
It is located at the cranial end of the testes.
Where do the ductus deferens arise from?
From the tail of the epididymus.
What are the ductus deferens responsible for?
For transporting sperm from the epididymis to the ejaculatory ducts.
What strucutre does the ductus deferens attach to?
It attaches to a structure called the mesorchium.
What helps the ductus deferens to attach to the mesorchium?
A structure mesoductus deferens.
What structures accompany the ductus deferens as it travels to the ejaculatory ducts?
The small deferent artery and vein.
What kind of gland is the prostate gland?
An exocrine gland.
What is the only accessory sex gland within the dog?
The prostate.
Where is the prostate gland located?
Near the neck of the bladder where it will envelop the urethra.
What is the inguinal canal?
A structure that lies between the abdominal muscles.
Will the inguinal canal be found exclusively in males?
No, it is found in both sexes.
What is the inguinal canal defined as?
As a short fissure that is filled with connective tissue.
What does the inguinal canal allow for in males?
It allows the vaginal tunic and spermatic cord to pass through.