Perineum

Question 1

Structures that form the pelvic diaphragm

Answer 1

• Levator ani muscles
• Small coccyges
• covering fasciae

Question 2

Perineum is bonded laterally by________, posteriorly by ________ and anteriorly by __________?

Answer 2

Laterally - ischial tuberosity
Posteriorly - coccyx
Anteriorly - pubis symphysis

Question 3

Nerve supply skin around the anus

Answer 3

Hemorrhoidal nerve/ inferior rectal nerve

Question 4

Bounded behind by the tip of the coccyx on each side by the ischial tuberosity and sacrotuberous ligament, overlapped by the border of gluteus maximus

Answer 4

Anal triangle

Question 5

Fibrous tissue lying between the anal canal and the coccyx

Answer 5

Anococcygeal body

Question 6

Fascia that closes the urogenital triangle

Answer 6

Perineal membrane

Question 7

Mucous membrane of the upper half of the anal canal is derived from?

Answer 7

Hindgut

Question 8

Lymphatic drainage of superior rectal artery

Answer 8

Pararectal nodes and eventually to inferior mesenteric nodes

Question 9

Mucous membrane of the lower half of the anal canal

Answer 9

Ectorderm of the proctodeum

Question 10

Nerve supply of external voluntary sphincter, mucous membrane of the lower half and perineal skin

Answer 10

Inferior rectal nerve branch of pudendal nerve

Question 11

Wedge-shaped space located on each side of anal canal

Answer 11

Ischiorectal fossa

Question 12

A branch of sacral plexus and leaves the main pelvic cavity through the greater sciatic foramen

Answer 12

Pudendal nerve

Question 13

Supplies the urogenital triangle and the skin on the surface of scrotum or labia majora

Answer 13

Perineal nerve

Question 14

A branch of internal iliac artery and passes from the pelvis through the greater sciatic foramen and enters the perineum through the lesser sciatic foramen

Answer 14

Internal pudendal artery

Question 15

Bounded in front by the pubic arch and laterally by the ischial tuberosities

Answer 15

Urogenital triangle

Question 16

Varicosities of the superior rectal (hemorrhoidal) vein and are covered by mucous membrane

Answer 16

Internal hemorrhoids/ piles

Question 17

Varicosities of the tributaries of the inferior rectal vein as they run laterally from the anal margin

Answer 17

External hemorrhoids

Question 18

Indicates the level where the upper half of the anal canal joins the lower half

Answer 18

Pectinate line

Question 19

Formed from a thickening of the smooth muscle of the circular coat at the upper end of the anal canal

Answer 19

Internal sphincter

Question 20

At the junction if rectum and anal canal is the anorectal ring. What muscles are involved in this ring?

Answer 20

• internal sphincter
• deep part of the external sphincter
• puborectalis

Question 21

Corresponds to the penis of male

Answer 21

Clitoris

Question 22

Situated at the apex of the vestibule anteriorly

Answer 22

Clitoris

Question 23

What are the roof of clitoris which are the three muscles of erectile tissue?

Answer 23

• bulb of the vestibule

- right and left crura of the clitoris

Question 24

It is attached to the undersurface of the urogenital diaphragm and is covered by the bulbospongiosus muscle

Answer 24

Bulb of the vestibule

Question 25

Consist of two corpora cavernosa covered by their ischiocavernous musvle

Answer 25

Body of the clitoris

Question 26

A small mass of erectile tissue that caps the body of the clitoris

Answer 26

Glans of the clitoris

Question 27

Surrounds the orifice of the vagina and covers the vestibular bulbs

Answer 27

Bulbospongiosus muscle

Question 28

Contraction of this muscle assists in causing the erection of the clitoris

Answer 28

Ischiocavernous muscle

Question 29

Wedge-shaped mass of fibrous tissue situated between the lower end of the vagina and the anal canal

Answer 29

Perineal body

Question 30

Corresponds to prostate in male

Answer 30

Paraurethral glands

Question 31

Pair of small mucus secreting glands that lie under cover of the posterior parts of the bulb of vestibule and labia majora

Answer 31

Greater vestibular glands

Question 32

Blood supply of vagina

Answer 32

Vaginal artery

Question 33

Nerve supply of anterior part of vulva

Answer 33

Ilioinguinal nerves and genitofemoral nerves

Question 34

Nerve supply of posterior part of vulva

Answer 34

Perineal nerves and posterior cutaneous nerves

Question 35

Venous drainage of vaginal veins

Answer 35

Internal Iliac veins