Male Repro Flashcards
What are the male animal’s gonads that produce gametes?
Testes
Where do testis begin development?
In cranial abdominal cavity
Through which structure do testis descend?
Inguinal canal
What covers the testes along with its related structures as they descend ?
Visceral serosal layer
What is the name of the visceral and parietal layers that cover the testes once in the scrotum?
Vaginal tunic
What is the deeper layer of the testes?
Tunica albuginea testis
Which structure is attached to the testis and is the maturation site for spermatozoa?
Epidydimis
List the 3 parts the make up the epidydimis
- head
- body
- tail
What carries mature spermatozoa to urethra?
Ductus deferens
Where does the ductus deferens meet the pelvic urethra?
At the level of the prostate in the dog
Describe a closed castration
Scrotum incised
Ligate vessels
On parietal vaginal tunic
Describe an open castration
Scrotum incised
Open parietal vaginal tunic
Ligate vessels on visceral vaginal tunic
What are 3 ways of temperature regulation of the testicle?
- Pampiniform plexus
- tunica dartos mm
- Cremaster mm
Define the pampiniform plexus
Venous plexus surrounding testicular artery that cools the arterial blood arriving to testicle
Which muscle runs along spermatic cord and raises and lowers the testicle?
Cremaster muscle
Describe the origin and insertion of the cremaster muscle
-Originates from the internal abdominal oblique
-Inserts on the vaginal tunic
What is the musculature of the scrotum?
Tunica dartos
What is the term used for a retained testicle?
Cryptorchidism
Where can a testicle be retained if it is undescended?
In the inguinal canal or in the body (not adhered to anything)
What is the mesentery of the testicular vessels and nerves?
Mesorchium
Define the mesoductus deferens
Mesentery of the ductus deferens
The mesentery spanning between the 2 ductus deferentia as they course towards urethra: ________________
Genital fold
List the structures associated with the spermatic cord
- testicular artery
- testicular vein
- nervous/lymphatic supply
- mesorchium
- ductus deferens + its mesentery
What is the structure that anchors the testis to the tail of the epidydimis?
Proper ligament of the testis
What is the function of the ligament of the tail of the epidydimis?
Anchor the epidydimis to the scrotum
Describe the reproductive pathway of the canine genitourinary tract
Testis to epidydimis to ductus deferens to prostatic/ pelvic urethra to penile urethra to external urethral orifice
In mammals, what anchors the penis to the ischium and formed by it when jointing the urethra at level of ischial arch?
Left and right crura
Where do the crura and urethra join, that has a distinct bulb?
Root???
What is the continuation of the penis dismally from the root????
The body
Distally to the root, the ______________ is the distal free end.
Glans penis
Define the external urethral orifice
The external opening of the penis
Which muscle runs on the ventral aspect of the body and glans of the penis?
Retractor penis muscle
Which muscle covers the origin of the crus and inserting on it distally?
Ischiocavernosus muscle
Describe the muscle covering of the bulb of the penis
Bulbuspongiosus muscle
Name the fibrous architecture of the penis
Tunica albuginea penis
What are the 2 erectile tissue types of the penis?
Corpus cavernosum and spongiosum
Which type of erectile tissue is bilateral and dorsal?
Corpus carvenosum
Which erectile tissue surrounds the urethra?
Corpus spongiosum
Which erectile tissue originates at the crura of penis?
Corpus cavernosum
The erectile tissue that originates from the bulb of the penis is the?
C. Spongiosum
Because the canine penis contains high percentage of erectile tissue vs architecture, it is considered:
Musculocavernous
The two regions of the glans are:
- bulbous glands
- longa glandis
What is the more proximal part of the glans that is composed of corpus spongiosum?
Bulbous glandis
Define the longa glandis
The elongated distal end of the glans
The ___________ will be present in the glans penis, with a centrally oriented urethral groove
Os penis?
Where is the most common for a urolith obstruction?
Os penis?
Where does the penis extend through when erect ?
Preputial orifice
What is the inner layer of the prepuce composed of?
Mucous membranes
What does the prostate do?
Secretes fluid for semen
Describe the location and shape of the prostate
It is a bilobed structure with a dorsally located indentation. It surrounds the neck of the bladder and proximal urethra
What are some common disorders with intact males?
Prostatic neoplasia ; benign prostate hyperplasia
List the 4 pouches of the pelvic cavity
- pararectal fossa
- rectogenital pouch
- genitovesical pouch
- Pubovesical pouch
What is something that can occur in the pouches?
Hernias
List what makes up the spermatic cord
- Testicular artery
- testicular vein
- Ductus deferens