penis: erectile tissues, muscles, fascial coverings Flashcards Preview

Repro anatomy > penis: erectile tissues, muscles, fascial coverings > Flashcards

Flashcards in penis: erectile tissues, muscles, fascial coverings Deck (31):
1

what happens to the erectile tissues during sexual arousal?

The erectile tissues fill with blood

2

what happens when the erectile tissue fills with blood during sexual arousal?

produces an erection

3

what are the root and body of the penis spanned by?

three masses of erectile tissue

4

in the root, what are the erectile tissues known as?

left and right crura, and the bulb of the penis

5

where is the bulb of the penis situated?

in the midline of the penile root

6

what is the bulb of the penis transversed by?

urethra

7

where are the left and right crura located within the penis?

laterally (to the bulb - either side)

8

what do the left and right crura attach to?

to the ipsilateral ischial ramus

9

where do the erectile tissues continue into?

the body of the penis

10

where do the left and right crura move?

move anteriorly into the dorsal part of the penis

11

what do the left and right crura form?

the two corpora cavernosa

12

what are the left and right crura separated by?

by the septum of the penis, although often incompletely

13

what does the bulb of the penis form?

forms the corpus spongiosum

14

where does the corpus spongiosum lie?

ventrally

15

where does the male urethra run?

through the corpus spongiosum

16

why does the male urethra run through the corpus spongiosum?

to prevent the urethra from becoming occluded during erection

17

what happens to the corpus spongiosum during erection? (why urethra runs through it)

the corpus spongiosum fills to a reduced pressure
(prevents urethra from being occluded)

18

distally, what does the corpus spongiosum expand to form?

forms the glans penis

19

how many muscles are there in the root of the penis?

4

20

what are the 4 muscles in the root of the penis?

2 x Bulbospongiosus
2 x Ischiocavernosus

21

what are the 2 bulbospongiosus muscles in the root of the penis associated?

associated with the bulb of the penis

22

what does contraction of the 2 bulbospongiosus muscles in the root of the penis lead to?

It contracts to empty the spongy urethra of any residual semen and urine

23

what do the anterior fibres of the bulbospongiosus muscles' anterior fibres aid in?

aid in maintaining erection by increasing the pressure in the bulb of the penis

24

what do the 2 x Ischiocavernosus muscles in the root of the penis surround?

surrounds the left and right crura of the penis

25

what does contraction of the 2 x Ischiocavernosus muscles lead to?

force blood from the cavernous spaces in the crura into the corpus cavernosa – this helps maintain erection

26

how many fascial covering does each mass of erectile tissue contain?

two fascial coverings each

27

what is the most superficial layer of fascial covering of the erectile tissue?

the deep fascia of the penis

28

what is the deep fascia of the penis (superficial layer of fascial covering of erectile tissue) a continuation of?

a continuation of the deep perineal fascia

29

what does the deep fascia of the penis (superficial layer of fascial covering of erectile tissue) form? binding?

forms a strong membranous covering which binds the erectile tissues together

30

what is the deep fascia covering of the erectile tissues?

the tunica albuginea

31

what does the tunica albuginea form? (deep fascial covering of erectile tissue)

forms an individual capsule around each cavernous body