Perineum: anal & urogenital triangles Flashcards Preview

Repro anatomy > Perineum: anal & urogenital triangles > Flashcards

Flashcards in Perineum: anal & urogenital triangles Deck (33)
Loading flashcards...
1

what is the anal triangle?

the posterior half of the perineum

2

what is the anal triangle bounded by?

the coccyx, sacrotuberous ligaments and an imaginary line between the ischial tuberosities

3

components of the anal triangle?

Anal aperture
External anal sphincter muscle
Two ischioanal fossae

4

what is the anal aperture?

the opening of the anus

5

what is the External anal sphincter muscle

voluntary muscle responsible for opening and closing the anus

6

what are the Two ischioanal fossae?

paces located laterally to the anus

7

where is the anal aperture located?

located centrally in the triangle with the ischioanal fossae either side

8

what do the ischioanal fossae contain?

fat and connective tissue

9

what is the function of the ischioanal fossae?

aid expansion of the anal canal during defecation

10

where do the ischioanal fossae extend?

extend from the skin of the anal region inferiorly to the pelvic diaphragm superiorly

11

what does the urogenital triangle comprise of?

the anterior half of the perineum

12

what is the urogenital triangle bounded by?

the pubic symphysis, ischiopubic rami, and an imaginary line between the two ischial tuberosities

13

what are the urogenital triangle associated with?

the structures of the urogenital system – the external genitalia and urethra

14

brief structure of the urogenital triangle?

complex, with a number of fascial layers and pouches

15

what is addition in the urogenital triangle that is not present in the anal triangle?

the urogenital triangle has an additional layer of strong deep fascia, known as the perineal membrane

16

what does the perineal membrane contain?

pouches on its superior and inferior surfaces

17

what are the different layers of the urogenital triangle? (deep to superficial)

Deep perineal pouch
Perineal membrane
Superficial perineal pouch
Deep perineal fascia
Superficial perineal fascia
Skin

18

what is the deep perineal pouch?

A potential space between the pelvic floor superiorly, and the perineal membrane inferiorly

19

what does the deep perineal pouch contain?

part of the urethra and the external urethral sphincter

20

what else is contained within the deep perineal pouch in males?

the bulbourethral glands and the deep transverse perineal muscles

21

what is the perineal membrane?

A layer of tough fascia

22

what is the perineal membrane perforated by?

the urethra and vagina

23

what is the role of the perineal membrane?

to provide attachment for the muscles of the superficial external genitalia, and to help support the pelvic viscera

24

what is the superficial perineal pouch?

A potential space between the perineal membrane superiorly, and the perineal fascia inferiorly

25

what does the superficial perineal pouch contain?

contains the erectile tissues that form the penis and clitoris, and three muscles

26

what are the 3 muscles contained within the superficial perineal pouch?

the ischiocavernosus, bulbospongiosus and superficial transverse perineal muscles

27

what else is located within the superficial perineal pouch aside from the erectile tissues that form the penis and clitoris, and three muscles?

The greater vestibular glands (Bartholin’s glands) are also located in the superficial perineal pouch

28

what is the deep perineal fascia?

Fascia covering the superficial perineal muscles

29

what is the superficial perineal fascia continuous with?

continuous with the superficial fascia of the abdominal wall

30

how can the superficial perineal fascia be divided?

into superficial and deep layers