male Flashcards
penis
tubular organ with a tip
peen Contains 3 long cylinders of tissue
Corpora cavernosa: 2 cylinders of spongy tissue that run length of penis at top
Engorge with blood when sexually aroused -> stiffen
corpus spongiusum:Spongy tissue that surrounds urethra->protects urethra from being squeezed shut during erection
Frenulum
thin tissue that connects the underside of the glans to the shaft
Corona
ridge around the edge of the glans (head)
Foreskin
loose skin that covers the glans
Should be easily to retract
Tyson’s glands
under foreskin found to produce smegma (controversial whether they exist)
Circumcision
Surgical removal of foreskin
At birth, adolescents, or adulthood
circumcision controversy
Non-circumcision movement in the 1980’s where researchers said risks outweigh benefits
Rate of circumcision in canada now is 32%, but it is declining
In 2015, pediatric health association said circumcision risks outweigh benefits
Decision to circumcise should be given later in life for consent
Sexual function:mixed evidence
One researcher said there was no difference between uncircumcised vs circumcised peen
HVI/STI;mixed evidence
In areas where few people use protection, have higher rates of STDs and less sex education found that uncircumcised penis may increase risk; but where we have good sexual health education and regular condom use we don’t see any effects
Supercision(in polynesia)
Slit on length of foreskin
Subcision
Slit made on the underside of penis (entire length of penis)
Urine comes out of base of penis instead of tip
Penis size
Avg length: 7 cm (3 inches) to 10 cm (4 inches) flaccid, 13 cm (5 inches erect)
Avg circumference: 11.5-12.5 cm (4.5-5 inches)
Katharina Ruppen-Greef:
According to women the most important aspects (penis length is not that important to pleasure):
1)general cosmetic appearance
2)pubic hair appearance
3)penile skin
4)penile girth
5)glans shape
6)penile length
7)scrotum appearance
Penis size lengthening
Only effective way to lengthen penis is surgery
Release of the fundiform ligament and the suspensory ligament
Cutting ligament connecting the penis to the body (gain around 0.5-1 inch)
Penis curvature
Most penises are curved and asymmetrical
Peyronie’s disease:
abnormal curvature of penis(due to injury)
Penile fracture
Rupturing of the membrane that surrounds the corpus cavernosa
Scrotum
Pouch of loose skin that holds the testes and spermatic cord
Cremaster muscle
thin layer of muscle around testes
Responsible for cremaster reflex (raises and lower scrotum due to temperature)
Testes need to be around a certain temperature to release sperm
Testes (in scrotum)
Serve 2 purposes:
1)seminiferous tubules produce sperm
2)interstitial cells produce androgens (ie testosterone)
Helps to create Secondary sex characteristic (ie facial hair)
Sperm
Produced in seminiferous tubules through spermatogenesis (maturation of sperm) (takes 74 days)-> then passed on to rete testes ->Collected in epididymis (for 6 weeks, if not used then get absorbed into body)
Produce 1000/second; 30 billion/year
Contain 23 chromosomes
Passage of sperm
1)Through vas deferens
2)Past the seminal vesicles(produce 60% of fluid that is ejaculated)
3)Past the prostate gland (produce 40% of fluid)
4)Then to Cowper’s gland: releases a clear alkaline fluid before ejaculation (pre-cum)
Help to neutralize the urethra
4)Then sperm comes out of the urethra
Semen
Made up:
~Sperm 1%
~Seminal fluid from the seminal vesicles (60%)
~Fluid from prostate (40%)
~~~Fluids provide nourishment for sperm (fructose)
