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G13: Urogenital (UG) Triangle

David A Morton

Syllabus - Pg. 3

ANAT 6010 Medical Gross Anatomy

1) UG Triangle - a)Overview

• Anterior half of the perineum

• Contains roots of external genitalia and openings

of the urogenital system

A

P

Pelvis - Inferior view

GAFS 5.32

Levator ani m./Pelvic diaphragm

GAFS 5.68

UG Triangle - Boundaries

GAFS 5.68

UG Triangle - Orientation

UG Triangle - Orientation

UG Triangle - Orientation

UG Triangle - Orientation

GAFS 5.37

UG Triangle - Boundaries

GAFS 5.68

UG Triangle - Boundaries

GAFS 5.69

UG Triangle - Boundaries

GAFS 5.69

Function

GAFS 5.72

1) UG Triangle 1) UG Triangle - b) Vasculature- b) VasculatureP

Female Male

1) UG Triangle 1) UG Triangle - b) Vasculature- b) VasculatureP

Female Male

Internal Internal

1) UG Triangle 1) UG Triangle - b) Vasculature- b) VasculatureP

Male

Internal

P

GAFS 5.77

P

1) UG Triangle 1) UG Triangle - b) Vasculature- b) VasculatureP

Male

Internal

1) UG Triangle 1) UG Triangle - b) Vasculature- b) VasculatureP

Male

1) UG Triangle 1) UG Triangle - c) Innervation- c) InnervationP

1) UG Triangle 1) UG Triangle - c) Innervation- c) InnervationP

GAFS 5.76a

1) UG Triangle 1) UG Triangle - c) Innervation- c) InnervationP

GAFS 5.76b

1) UG Triangle 1) UG Triangle - c) Innervation- c) InnervationP

2) Deep Perineal SpaceP

a) Boundaries

MaleFemale

2) Deep Perineal SpaceP

GAFS 5.35

GAFS 5.35

GAFS 5.35

GAFS 5.36

2) Deep Perineal Space - Male

P 39

b) Compare/contrast conte

2) Deep Perineal Space - Female

P 39

b) Compare/contrast conte

3) Superficial Perineal Pouch

MaleFemale

a) Boundaries

P

GA3) Superficial Perineal Space

M

Fema

3) Superficial Perineal Space

Male

Female

GAFS 5 71

3) Superficial Perineal Space - Male

Perineum (Coronal Section) - FemaleP

Membranous La

of Superficial Fa

In abdomen

= Scarpa’s

In Perineum

= Colles’

GAFS

P 40

3) Superficial Perineal Space

Deep Perineal Space

Male Female

Membranous urethra Membranous urethra

Deep transverse perineal muscle Deep transverse perineal muscle

Sphincter urethra muscle Sphincter urethra muscle

Internal pudendal arteries Internal pudendal arteries

Artery to bulb Artery to bulb

Deep artery of penis Deep artery of clitoris

Dorsal artery of penis Dorsal artery of clitoris

Muscular branches Muscular branches

Internal pudendal veins and branches Internal pudendal veins and branches

Pudendal nerves and branches Pudendal ne rves and branches

Bulbourethral glands and ducts ----------

---------- Tube of the vagina

P

Superficial Perineal SpaceMale Female

Roots of external genitalia Roots of external genitalia

Bulb/corpus spongiosum penis* Bulb/bulbovestibuli

Crus/corpora cavernosa penis** Crus/corpora cavernosa clitoris**

Bulbospongiosa muscle Bulbovestibuli muscle

Ischiocavernosa musc le Ischiocavernosa muscle

Spongy urethra Spongy urethra

Perineal nerves, arteries and veins (N, A & V)

Perineal nerves, arteries and veins (N, A &V)

Posterior scrotal N, A & V Posterior labial N, A & V

Muscular branches Muscular branches

Superfic ial transverse perineal muscle Superficial transverse perineal muscle

---------- Greater vestibular glands and ducts

---------- Tube of the vagina

* Changes names distal to the suspensory ligament to corpus spongiosa penis ** Changes names distal to the suspensory ligament to corpora cavernosa penis/clitoris

P

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