male reproductive system Flashcards

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1
Q

mesonephric duct

A

future male ducts

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2
Q

what do the gonads develop as?

A

intermediate mesoderm called gonadal ridges

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3
Q

the mesonephric duct becomes…

A

epididymis, ductus deferens, ejactulatory duct

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4
Q

urogenital sinus

A

future urethra and bladder lying deep to tubercle

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5
Q

urethral groove

A

external opening of urogenital sinus running between genital tubercle and anus, laterally flanked by urethral folds and labioscrotal swellings

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6
Q

what does the enlarged genital tubercle form?

A

penis and urethral folds which fuse to the midline to form penile urethra

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7
Q

what becomes the scrotum?

A

labioscrotal swellings join the midline

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8
Q

testes

A

move toward scrotum taking blood supply and innervation with it, pulls layers of the abdominal wall with it

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9
Q

gubernacuium

A

fibrous cord that attaches to the inferior portion of the testis and floor of developing scrotal sac

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10
Q

processus vaginalis

A

outpouching of peritoneal lining in the abdomen, pokes through layers of abdominal wall into developing scrotum

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11
Q

what layer of the abdominal wall is not in the testes?

A

transversus abdominis, layers are not inferior enough

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12
Q

what changes happen to the seminiferous tubules during puberty?

A

they are closed and then become tube like and are linked to the tubule system

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13
Q

what fuels the growth of the testes?

A

testosterone and production of sperm

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14
Q

scrotum

A

sac of skin that extends external to the abdominopelvic cavity, 3 degrees cooler (essential for sperm production)

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15
Q

two muscles of the scrotum

A

dartos and cremaster

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16
Q

dartos muscle

A

wrinkle skin of scrotum (external oblique)

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17
Q

cremaster muscle

A

raise teste closer to body wall in response to cold temperature or sexual arousal (internal oblique)

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18
Q

where is sperm manufactured?

A

testes, seminiferous tubules (site of sperm production)

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19
Q

epididymis

A

on organ where sperm is mature, more cord-like, thicker tube, sperm are stored here

20
Q

pathway for production & ejaculation of sperm

A

seminiferous tubules –> epididymis –> ductus/vas deferens –> joins ducts of seminal vesicles –> ejaculatory duct –> empties into urethra in prostate –> urethra (inside prostate)

21
Q

what attaches to the ejaculatory duct in addition to vas deferens?

A

seminal vesicles, providing fructose that nourishes sperm

22
Q

accessory sex glands

A

seminal vesicles, prostate gland, bulbourethral glands

23
Q

seminal glands

A

ejaculatory duct, lies between fundus of bladder & rectum, secretes a thick fluid that mixes with sperm as it passes into the ejaculatory duct & urethra

24
Q

secretions of seminal glands contain

A

fructose & other nutrients that nourish sperm, other substances to enhance fertilization

25
Q

ejaculatory ducts

A

slender tubes that arise by the union of the duct of a seminal gland with the ductus deferens near neck of bladder

26
Q

prostate gland

A

encircles the prostatic urethra

27
Q

prostatic secretions

A

1/3 of semen volume and contain enzymes that enhance sperm mobility

28
Q

bulbourethral glands

A

inferior to the prostate, secrete mucus (pre-ejaculation fluid)

29
Q

penis

A

3 columns of erectile tissue, corpus spongiosum, corpora cavernosa

30
Q

corpus spongiosum

A

unpaired, urethra running through

31
Q

corpora cavernosa

A

paired erectile tissue

32
Q

glas penis

A

expanded tip of the penis surrounding the urethral opening, continuous with corpus spongiosum

33
Q

prepuce (foreskin)

A

loose fold of skin surrounding the glans to a variable extent

34
Q

what anchors the penis to the body wall?

A

bulb and crus

35
Q

crura

A

angled portions off to side (ischiocavernosus)

36
Q

bulb

A

bulbosponginosus surrounds it

37
Q

single corpus spongiosum

A

surrounds urethra, enlarged proximally (root covered by bulbospongiosus muscle) and distally (glans)

38
Q

paired corpora cavernosa

A

covered by the ischiocavernosus muscles

39
Q

what is the function of the muscles corpus spongiosum and corpora cavernose?

A

maintaining erection and emptying the urethra

40
Q

fundiform ligament

A

condensation of abdominal wall fascia (superior attachment of penis to body wall)

41
Q

erection

A

sympathetic system- anit erection
parasympathetic system- pro erection (relaxation of smooth muscle allowing blood to flow into erectile tissue)

42
Q

what happens at the same time during erection?

A

the expanding erectile tissue puts pressure on the veins adn the bulbospongiosus and ischiocavernosus muscles compress erectile tissue compressing veins decreasing outflow of blood

43
Q

what are the three parts of erection in males and females?

A

reflexogenic (stimulation), psychogenic (thought induced), nocturnal (REM sleep)

44
Q

two phases of ejaculation

A

emission and expulsion

45
Q

emission (sympathetic nervous system)

A

causes semen to be released into ducts, closes neck of bladder so semen components can’t enter allowing them to be released in the ducts

46
Q

expulsion (somatic nervous system)

A

mostly from pudendal nerve, peristalsis contractions of muscle, parasympathetic encourages bulbourethral glands to secrete mucus

47
Q

hypospadias

A

fusion of urethral folds is incomplete, usually requires surgery to stitch it back up