Quantcast Secondary Sex Organs - Basic Human Anatomy

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
a. Location. The paired testes lie within the scrotum. The scrotum is a sac of
loose skin attached in the pubic area of the lower abdomen. The scrotum provides a
site cooler than body temperature to maintain the viability of the spermatozoa.
However, when the air is too cold, muscles and muscular fibers draw the testes and
scrotum closer to the body to maintain warmth. Otherwise, the scrotum hangs loosely.
The tunica vaginalis is a serous cavity surrounding each testis.
b. Functions. The testis produces the male sex cells called spermatozoa
(spermatozoon, singular). The spermatozoa are continuously produced by the millions.
One such cell may eventually fertilize an ovum of a human female. The testes also
produce male sex hormones called androgens.
8-15. SECONDARY SEX ORGANS
a. Epididymis. The epididymis is a coiled tube whose function is to aid in the
maturation of spermatozoa. Its coiled length is only about one and one-half inches. Its
uncoiled length is about 16 feet. When coiled, it extends downward along the posterior
side of each testis. Its lining secretes a nutritive medium for spermatozoa. It receives
spermatozoa from the testes in an immature state. As the spermatozoa pass through
the nutrient, they mature.
b. Ductus (Vas) Deferens. The ductus deferens is a transporting tube which
carries the mature sperm from the epididymis to the prostate. Each tube enters the
abdomen through the inguinal canal. Each passes over a ureter to reach the back of
the urinary bladder and then down to the prostate gland.
c. Seminal Vesicles. Lying alongside each ductus deferens as it crosses the
back of the bladder is a tubular structure called the seminal vesicle. The seminal
vesicle produces a fluid which becomes part of the ejaculate.
d. Ejaculatory Duct. Each ductus deferens and its corresponding seminal vesicle
converge to form a short tube called the ejaculatory duct. The ejaculatory duct opens
into the urethra within the prostate gland. The ejaculatory duct carries both sperma-
tozoa and seminal vesicle fluid.
e. Prostate Gland. As the urethra leaves the urinary bladder, its first inch is
surrounded by a chestnut-size gland called the prostate gland. The prostate gland
provides an additional fluid to be added to the spermatozoa and seminal vesicle fluid.
f. Penis. As the urethra leaves the abdomen, it passes through the penis, the
male organ of copulation.
MD0006
8-12



Medical News
Anaesthesia: optimum ventilation strategy during general anaesthesia in abdominal operations found
A multi-centre study at 30 centres across Europe, North and...
medicalxpress.com
Study shows epigenetic changes can drive cancer
Cancer has long been thought to be primarily a genetic...
medicalxpress.com
Stanford internships provide Bay Area students with work experience, opportunity to discover passions
This summer high school students from around the Bay Area...
scopeblog.stanford.edu
Stanford internships provide Bay Area students with work experience, opportunity to discover passions
This summer high school students from around the Bay Area...
scopeblog.stanford.edu
This Week: AIDS Progress, Vegan Diet
(MedPage Today) -- Delegates to the IAC step up the...
medpagetoday.com
Three Strikes: Time to End Lethal Injection?
(MedPage Today) -- The third botched execution of a death...
medpagetoday.com
Slow walking speed and memory complaints can predict dementia (w/ Video)
A study involving nearly 27,000 older adults on five continents...
medicalxpress.com
Nigeria confirms Liberian man died of Ebola in Lagos (Update)
Nigeria said Friday that Ebola caused the death of a...
medicalxpress.com
Study recommends inmate immunity test
(AP)—Federal experts are recommending that California test inmates for immunity...
medicalxpress.com
A humorous look at how a background in science can help with parenting
Scientist-moms out there might enjoy this playful (tongue-in-cheek) Huffington Post...
scopeblog.stanford.edu
A humerous look at how a background in science can help with parenting
Scientist-moms out there might enjoy this playful (tongue-in-cheek) Huffington Post...
scopeblog.stanford.edu
Tweet of the Week: C. diff Barbie
(MedPage Today) -- Welcome to another edition of the MedPage...
medpagetoday.com
HIV Cure Still Years Away (CME/CE)
(MedPage Today) -- MELBOURNE, Australia -- The word "cure" is...
medpagetoday.com
Friday Feedback: Pradaxa Monitoring?
(MedPage Today) -- This week, Friday Feedback takes a look...
medpagetoday.com
Communist Sperm? That's Improbable!
(MedPage Today) -- A weekly report from our friends at...
medpagetoday.com
Serum free light chain level increase precedes amyloidosis
(HealthDay)—Increased serum free light chains (FLCs) precede the presentation of...
medicalxpress.com
Language barriers don't raise diabetes complication risk
(HealthDay)—For immigrants, language barriers are not associated with an increased...
medicalxpress.com
New EMS system in Arizona dramatically improves survival from cardiac arrest
A new system that sent patients to designated cardiac receiving...
medicalxpress.com
Manipulating key protein in the brain holds potential against obesity and diabetes
A protein that controls when genes are switched on or...
medicalxpress.com
Anal, throat cancers on the rise among young adults, study finds
(HealthDay)—Although cervical cancers are declining in the United States and...
medicalxpress.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +