sexual anatomy: man

Question 1

corpora cavernosa

Penis

Answer 1

• two cylinders of spongy
  tissue that run length of
  penis
• **engorge with blood when
  sexually aroused **→ stiffen

Question 2

corpus spongiosum

Answer 2

spongy tissue that surrounds
urethra → protects urethra
from being squeezed shut
during erection

Question 3

frenulum

Answer 3

hin tissue that
connects the underside
of the glans to the shaft

Question 4

corona

Answer 4

ridge around the
edge of the glans

sexual plesure and arousal

Question 5

foreskin (prepuce)

Answer 5

loose skin that covers
the glans

smegma – cheese-like
substance that can
collect under the
foreskin(helps provide lumbrificant

Question 6

Circumcision

Answer 6

• surgical removal of the foreskin
• at birth, adolescence, or adulthood

Question 7

Circumcision – The Controversy

Answer 7

• non-circumcision movement
• consent
• sexual function: mixed evidence
• HIV/STIs: mixed evidence
• in areas where few people use protection, may decrease risk; however, behavioural effects

Supercision(slit on the top of the foresink)
Subcision(cut all the way to the urethea

Question 8

Penis Size

Answer 8

average length:

7cm (3inches) to 10cm (4 inches) flaccid

13 cm (5 inches) erect

average circumference: 11.5-12.5 cm (4.5-5 inches)

Question 9

Katharina Ruppen-Greeff et al. (2015):

Answer 9

according to women, the most important aspects
(rank-ordered):
1.“general cosmetic appearance”
2.pubic hair appearance
3.penile skin
4.penile girth
5.glans shape
6.penile length
7.scrotum appearance
Anatomy – People with penises

Question 10

Penis Size Lengthening(surgery)

Answer 10

• only effective was to
  lengthen penis is surgery
• release of the fundiform
  ligament and the
  suspensory ligamen

Question 11

Penis Curvature

Answer 11

most penises are curved
and asymmetrical

• Peyronie’s disease: after a lot of trauma(injury) it curves a lot(medication)

Question 12

Penile Fracture

Answer 12

• **rupturing **of the membrane
  that surrounds the corpus
  cavernosa

a lot of blood

trauma/injury

Question 13

Scrotum

Answer 13

• pouch of loose skin that
  holds the testes and
  spermatic cord
• Cremaster muscle provides the cremaster reflexes :responisble for lowering or hightening of the scroting(ex:due to temperture)

Question 14

Testes

it is inside the scrotum

ovaries for women

Answer 14

serve two purposes:
1. Seminiferous tubules produce sperm

2. Interstitial cells produce androgens
   (i.e., testosterone

secondary sex characteristics

Question 15

Sperm

Answer 15

• produced in the seminiferous tubules through spermatogenesis (74 days)
• produce 1000/second; 30 billion/year
• contain 23 chromosomes

created at the testies > reti tasties > collected in the epididymis

Question 16

Passage of the Sperm/ejaculation

Answer 16

• through vas deferens
• past the seminal vesicles
• through the prostate gland
• past the Cowper’s gland

Question 17

Semen

Answer 17

made up:
* sperm (1%)

• seminal fluid from the seminal vesicles (60%)
• fluid from the prostate (40%)
• fluids provide nourishment for sperm (fructose)