Male Reproductive System
Biology 4000 with Kempf at Auburn University
About this deck
By: Kelly Anderson
Created: 2012-04-27
Size: 50 flashcards
Views: 3
Created: 2012-04-27
Size: 50 flashcards
Views: 3
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Sperm
-seminiferous tubule
-epidydimus
-vas deferens
-ampulla
(seminal vesicle)
-ejaculatory duct
-urethra
(bulbourethral gland)
-penis
-seminiferous tubule
-epidydimus
-vas deferens
-ampulla
(seminal vesicle)
-ejaculatory duct
-urethra
(bulbourethral gland)
-penis
Male Reproductive Tract & Germ cells derived from
extraembryonic yolk sac endoderm in mammals
3- seminiferous tubule
4- tubuli recti
7- rete testes (mediastium testes)
8- ductuli efferentes
2- epididymus
1- vas deferens
5- tunical albuginia
6- septum
4- tubuli recti
7- rete testes (mediastium testes)
8- ductuli efferentes
2- epididymus
1- vas deferens
5- tunical albuginia
6- septum
Tunica albuginiea (male)
Thick CT capsule surrounding each testes
Mediastinum testies
aka rete testes
thickened region of tunica albuginia
thickened region of tunica albuginia
Function of Testes Septa
Divides interior of testies into incomplete compartment called testicular lobules.
Seminiferous tubules are the site of production of ____________.
spermatozoa
Ducts in the testes
Seminiferous tubules
Tubuli recti
Tubuli recti
simple cuboidal epithelium composed of Sertoli cells
Simple cuboidal & simple columnar epithelium that creates a wavy pattern.
Simple cuboidal + ciliated simple columnar cells
Structure of Ductuli Efferentles
10-15 twisted ducts that extend from rete testes to epididymis with a layer of smoothe muscle.
**ONLY part of male tract with CILIATED cells**
**ONLY part of male tract with CILIATED cells**
pseudostratified columnar cells with STEROCILIA (not cilia)
Highly convoluted tube between ductuli efferentes & vasa recta that is surrounded by smooth muscle.
Final maturation of sperm occurs in the _______.
Epididymis
Sterocilia vs. Cilia
Cilia - true 9+2, can move
Stereocilia - no 9+2, cannot move
Stereocilia - no 9+2, cannot move
Vas deferens epithelium
pseudostratified columnar epithelium with stereo cilia
straight tube w/ thick walls
Mucosa- pseudostratified columnar epithelium w/ stereocilia + lamina propria
Smooth Muscle
-inner long
-middle circular
-outer long
**moves out for ejaculation**
Mucosa- pseudostratified columnar epithelium w/ stereocilia + lamina propria
Smooth Muscle
-inner long
-middle circular
-outer long
**moves out for ejaculation**
Two Sub-components of Vas Deferens
Ampulla
Ejaculatory duct
Ejaculatory duct
Ampulla
widening near connection of vas deferens to urethra
Ejaculatory duct
short portion of vas deferens between ampulla and urethra that empties into urethra near prostate gland.
3 Parts of male urethra
- Prostatic urethra
- Membranous Urethra
- Penile/Spongy urethra
Epithelium of Urethra
Prostatic - transitional
Membranous - pseudostratified or stratified columnar
Penile - pseudostratified or stratified columnar
end of penile - non-keratinized statified squamous
Membranous - pseudostratified or stratified columnar
Penile - pseudostratified or stratified columnar
end of penile - non-keratinized statified squamous
What is the external sphincter?
The striated muscle sphincter around membranous portion of urethra.
What is the Bulbourethral glands?
aka Cowper's glands
Secrete first fluids of ejaculation into the membranous urethra to lubricate urethra for semen.
Secrete first fluids of ejaculation into the membranous urethra to lubricate urethra for semen.
Glands of Littre
mucous glands on entire length of penile urethra.
Glands associated with the male reproductive tract
- the paired seminal vesicles
- single prostate gland
- 2 bulbourethral glands (of Cowper)
- Glans of Littre
Seminal vesicles
One associated per vas deferens that produces a secretion that becomes 70% of semen fluid volume.
Prostate
Male gland under urinary bladder where vas deferens connects with urethra that forms part of the semen.
Structure of seminiferous tubules
Tunica propria
germinal epithelium
sertoli cells
germinal epithelium
sertoli cells
Tunica propria of seminiferous tubule is composed of:
-is a CT capsule-
1) fibroblasts - outer
2) myoid cells (muscle-like) w/ actin- inner
1) fibroblasts - outer
2) myoid cells (muscle-like) w/ actin- inner
Germinal epithelium in males
deciduous complex stratified epithelium that lines the seminiferous tubules.
Categories of Germinal Epithelium
1) Reproductive/germinal cells - spermatogenic cell linage, derived from spermatogonia
2) Somatic cells - sertoli cells
2) Somatic cells - sertoli cells
- Large cells with oval/round nuclei, located on the basal lamina - "on the ground floor"
- Stem cells of spermatogenesis - mitosis yields more spermatogonia or primary spermatocyte
Stages and Cell types of Spermatogenesis + additional cells
- Spermatogonia - 2n2c, mitosis
- Primary spermatocytes - 2n2c, divide during 1st meiotic division
- Secondary spermatocytes - 1n2c, divide during 2nd meiotic division
- Spermatids - 1n1c, immature spermatozoa
Sertoli cells - supportive
- spermateleosis
- spermatozoan metamorphosis
- spermatids --> spermatozoa
3 stages of spermatogenesis
- mitosis
- meiosis (I&II)
- spermiogenesis
How do spermatogonial cells divide?
Cyclically
every 16+1 days
every 16+1 days
Sertoli cell definition
- diploid somatic cell in seminiferous tubule epithelium
Sertoli cell functions
- provide nutrients & remove wastes
- phagocytose & digest shed cytoplasm
- secrete fluid - carry sperm out
- secrete hormones - anti-mullarian & inhibin
- compartmentalize developing gametes - separate from immune system
Interstitial tissue
tissue between seminiferous tubules
Interstitial tissues of testis consist of:
- CT
- hormone secreting cells
- nerves
- blood vessels
- lymph vessels
Nerves, blood vessels, and lymphatic vessels enter & leave testis through ________.
CT of the mediastinum testis (rete testis).
Cell types in the interstitial tissues of testis:
- Fibroblasts
- Mast cells
- Macrophages
Interstitial cells of Leydig
secrete testosterone: which is important in development and maintenance of primary (penis) and secondary male sex characteristics and control of spermatogenesis.
Structure of the penis?
two corpora cavernosa and the corpus spongiosum with urethra
corpora cavernosa
Spongy bodies running the length of the top of the penis surrounded by tunica albuginia (CT). Becomes engorged with blood during an errection.
Helicene arteries
Arteries that deliver blood to the sinuses of the corpora cavernosum that causes an errection.
Corporus spongiosum
Ventral cylinder of erectile tissue that surround the urethra and is dilated at the end to form the glans penis. It is also known as the corpus cavernosum of the urethra.
Prepuce
foreskin or penis that covers the glans penis
About this deck
By: Kelly Anderson
Created: 2012-04-27
Size: 50 flashcards
Views: 3
Created: 2012-04-27
Size: 50 flashcards
Views: 3
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
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“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis
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