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Anatomy > Perineum > Flashcards

Perineum Flashcards

1
Q

Structures that form the pelvic diaphragm

A
  • Levator ani muscles
  • Small coccyges
  • covering fasciae
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2
Q

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

A

Laterally - ischial tuberosity
Posteriorly - coccyx
Anteriorly - pubis symphysis

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3
Q

Nerve supply skin around the anus

A

Hemorrhoidal nerve/ inferior rectal nerve

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4
Q

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

A

Anal triangle

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5
Q

Fibrous tissue lying between the anal canal and the coccyx

A

Anococcygeal body

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6
Q

Fascia that closes the urogenital triangle

A

Perineal membrane

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7
Q

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

A

Hindgut

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8
Q

Lymphatic drainage of superior rectal artery

A

Pararectal nodes and eventually to inferior mesenteric nodes

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9
Q

Mucous membrane of the lower half of the anal canal

A

Ectorderm of the proctodeum

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10
Q

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

A

Inferior rectal nerve branch of pudendal nerve

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11
Q

Wedge-shaped space located on each side of anal canal

A

Ischiorectal fossa

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12
Q

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

A

Pudendal nerve

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13
Q

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

A

Perineal nerve

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14
Q

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

A

Internal pudendal artery

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15
Q

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

A

Urogenital triangle

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16
Q

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

A

Internal hemorrhoids/ piles

17
Q

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

A

External hemorrhoids

18
Q

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

A

Pectinate line

19
Q

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

A

Internal sphincter

20
Q

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

A
  • internal sphincter
  • deep part of the external sphincter
  • puborectalis
21
Q

Corresponds to the penis of male

A

Clitoris

22
Q

Situated at the apex of the vestibule anteriorly

A

Clitoris

23
Q

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

A
  • bulb of the vestibule

- right and left crura of the clitoris

24
Q

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

A

Bulb of the vestibule

25
Q

Consist of two corpora cavernosa covered by their ischiocavernous musvle

A

Body of the clitoris

26
Q

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

A

Glans of the clitoris

27
Q

Surrounds the orifice of the vagina and covers the vestibular bulbs

A

Bulbospongiosus muscle

28
Q

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

A

Ischiocavernous muscle

29
Q

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

A

Perineal body

30
Q

Corresponds to prostate in male

A

Paraurethral glands

31
Q

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

A

Greater vestibular glands

32
Q

Blood supply of vagina

A

Vaginal artery

33
Q

Nerve supply of anterior part of vulva

A

Ilioinguinal nerves and genitofemoral nerves

34
Q

Nerve supply of posterior part of vulva

A

Perineal nerves and posterior cutaneous nerves

35
Q

Venous drainage of vaginal veins

A

Internal Iliac veins

Anatomy (11 decks)

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