Pelvic Walls, Floor and Contents - Male Flashcards

1
Q

What are the differences between the general structure, greater pelvis and letter pelvis of the male and female?

A

MALE
General structure - thick and heavy
Greater pelvis - deep
Lesser pelvis - narrow and deep

FEMALE
General structure - thin and light
Greater pelvis - shallow
Lesser pelvis - wide and shallow

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2
Q

What parts of the pelvis are the true and false pelvis?

A

True pelvis = lesser pelvis

False pelvis = greater pelvis

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3
Q

What are the differences between the pelvic inlet and pelvic outlet of the male and female?

A

MALE
Pelvic inlet - heart shaped
Pelvic outlet - comparatively small

FEMALE
Pelvic inlet - oval and rounded
Pelvic outlet - comparatively large

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4
Q

What are the difference between the sub-pubic angle, obturator foramen and acetabulum of the male and female pelvis?

A

MALE
Sub-pubic angle - narrow
Obturator foramen - round
Acetabulum - large

FEMALE
Sub-pubic angle - wide
Obturator foramen - oval
Acetabulum - small

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5
Q

What are the articulation of the pelvic bones?

A

Sacroiliac joint
Pubic symphysis
Hip joint

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6
Q

What are the components of the pelvic bone?

A

Ilium
Pubis
Ischium

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7
Q

What is the name given to the socket formed by the fusion of the ilium, pubis and ischium?

A

Acetabulum

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8
Q

At what age does the acetabulum become complete?

A

20-25 years old

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9
Q

What does the acetabulum provide?

A

Articulation with the head of the femur to form he hip joint

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10
Q

What part of the pelvic bone is the ilium, and what are its features?

A

Superior part

Widest and largest of the three parts

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11
Q

What forms the superior part of the acetabulum?

A

Body of the ilium

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12
Q

What is the inner concave surface of the ilium known as? What does it provide origin to?

A

Iliac fossa

Provides origin to the iliac muscle

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13
Q

What does the external surface of the ilium provide attachment to?

A

Gluteal muscles

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14
Q

Why is the anterior superior iliac spin an important anatomical landmark?

A

Halfway between the ASIS and the pubic symphysis the femoral artery can be palpated
Midpoint of inguinal ligament is located halfway between ASIS and pubic tubercle

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15
Q

What is the most anterior portion of the pelvic bone? What are its features?

A

Pubis

Body, superior ramus, inferior ramus

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16
Q

What does the body of the pubis articulate with?

A

The opposite pubic body at the pubic symphysis

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17
Q

The superior ramus of the pubis extends laterally from the body to form part of what?

A

The acetabulum

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18
Q

The two rami of the pubis enclose what?

A

Part of the obturator foramen through which obturator nerve, artery and vein pass to reach the lower limb

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19
Q

What forms the postero-inferior part of the pelvic bone? What are its features?

A

Ischium

Body, inferior ramus, superior ramus

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20
Q

The inferior ramus of the ischium combines the th inferior pubic ramus to form what?

A

Isciopubic ramus, which encloses part of obturator foramen

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21
Q

On the posterior aspect of the ischium there is an infestation known as

A

the greater sciatic notch

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22
Q

The sacrospinus ligament runs from the ischial spine to the sacrum, creating

A

the greater sciatic foramen, through which the lower limb neurovasculature travels

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23
Q

The sacrotuberous ligament runs from the sacrum to the ischial tuberosity, forming the

A

lesser sciatic foramen

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24
Q

What are the components of the pelvic girdle?

A

Two pelvic bones
Sacrum
Coccyx

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25
Q

What are the articulation of the pelvic girdle with the pelvis?

A

Sacroiliac joints
Sacrococcygeal symphysis
Pubic symphysis

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26
Q

What are the functions of the pelvis?

A

Transfer of weight from upper axial skeleton to the lower appendicular components
Provides attachment for muscles and ligaments
Contains and protects the abdominopelvic and pelvic viscera

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27
Q

What is the greater pelvis?

A

Superior portion of the pelvis (false pelvis) which provides support to the lower abdominal viscera

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28
Q

What is the lesser pelvis?

A

The inferior (true) portion of the pelvis, pelvic cavity and pelvic viscera lie in this

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29
Q

What is the pelvic inlet?

A

The junction between the greater and lesser pelvis

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30
Q

What are the borders of the pelvic inlet?

A

Sacral promontory
Arcuate line and pectineal line
Pubic symphysis

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31
Q

What is the linea terminalis?

A

Combined pectineal line, arcuate line and sacral promontory

32
Q

What is the iliopectineal line?

A

Combined arcuate and pectineal lines

33
Q

What are the borders of the pelvic outlet?

A

Tip of coccyx
Ischial tuberosities and inferior margin of sacrotuberous ligament
Pubic arch

34
Q

Most women have a gynaecoid pelvis as opposed to what?

A

The male android pelvis

35
Q

What is the pelvic floor?

A

Muscular structure which attaches to the walls of the lesser pelvis and separates the pelvic cavity from the inferior perineum

36
Q

What gaps are in the pelvic floor in order to allow for urination and defection?

A
Urogenital hiatus (anterior gap, urethra and vagina in females) 
Rectal hiatus (central gap, anal canal passage)
37
Q

What lies between the urogenital hiatus and rectal hiatus?

A

Perineal body

38
Q

What are the functions of the pelvic floor muscles?

A

Support of abdominopelvic viscera
Resistance to increases in intra-pelvic and intra-abdominal pressure
Maintaining urinary and faecal continence

39
Q

What action do the muscles of the pelvic floor have on the rectum and urethra?

A

Sphincter action - relax to allow urination and defaecation

40
Q

What are the components of the pelvic floor?

A

Levator ani muscles
Coccygeaus muscles
Fascial coverings of the muscles

41
Q

What is the innervation of the levator ani muscles?

A

Branches of pudendal nerve - roots S2, S3 and S4

42
Q

What are the levator ani muscles?

A

Broad sheet of muscle composed of three separate paired muscles;
Pubococcygeus
Puborectalis
Iliococcygeus

43
Q

What is the anterior attachment of the levator ani muscles to the pelvis?

A

Pubic bodies of hip bone

44
Q

What is the lateral attachment of the levator ani muscles to the pelvis?

A

Thickened fascia of the obturator internus muscle

45
Q

What is the posterior attachment of the levator ani muscles to the pelvic?

A

Ischial spines of hip bone

46
Q

What are the two main functions of the penis?

A

Micturition

Sexual intercourse

47
Q

What are the four muscles located in the root of the penis?

A

2 x bulbospongiosus muscles

2 x ischiocavernosus muscles

48
Q

What are the supporting ligaments of the penis?

A

Suspensory ligament

Fundiform ligament

49
Q

What is the innervation of the penis?

A

S2-S4 spinal cord segments and spinal ganglia
Sensory and sympathetic innervation to skin and glans supplied by dorsal nerve of penis
Parasympathetic innervation by cavernous nerves from prostatic nerve plexus

50
Q

What are the roles of the testes and epididymis?

A

Testes - site of sperm production and hormone synthesis

Epididymis - role in sperm storage

51
Q

Where are spermatozoa produced?

A

Seminiferous tubules

52
Q

What are the coverings of the testes?

A

Tunica vaginalis

Tunica albuginea

53
Q

What is the innervation of the testes and epididymis?

A

Testicular plexus

54
Q

What is the blood supply of the penis?

A

Dorsal arteries of penis, deep arteries of penis and bulbourethral branch (all branches of internal pudendal artery)

55
Q

What is the blood supply of the testes and epididymis?

A

Paired testicular arteries (arise from abdominal aorta)

56
Q

What is the venous drainage of the testes and epididymis?

A

Paired testicular veins

57
Q

Where do the left and right testicular veins drain?

A

Left drains into the left renal vein

Right drains directly into the IVC

58
Q

What is the lymphatic drainage of the testes and epididymis?

A

Lumbar and para-aortic nodes

59
Q

What is the lymphatic drainage of the scrotum?

A

Superficial inguinal nodes

60
Q

What are the contents of the scrotum?

A

Testes
Epididymis
Spermatic cord

61
Q

What is the arterial supply of the scrotum?

A

Posterior and anterior scrotal arteries

62
Q

What is the venous drainage of the scrotum?

A

Scrotal veins

63
Q

What is the cutaneous innervation of the scrotum?

A

Genital branch of genitofemoral nerve
Anterior scrotal nerves
Posterior scrotal nerves
Perineal branches of posterior femoral cutaneous nerve

64
Q

What are the contents of the spermatic cord?

A
Testicular artery 
Cremaster artery and vein 
Artery to vas deferens 
Pampiniform plexus of testicular veins 
Genital branch of genitofemoral nerve 
Vas deferens 
Lymph vessels 
Processus vaginalis 
Autonomic nerves
65
Q

What is the pampiniform plexus?

A

Network of veins responsible for venous drainage of the testes
Also acts as heat exchanger, cooling arterial blood before it reaches the testes

66
Q

What is the vas deferens?

A

Straight, thick muscular tube that conveys sperm from the epididymis to the ejaculatory duct

67
Q

What are the bulbourethral glands?

A

Pair of exocrine glands located posterolateral to the membranous urethra which contribute to final volume of semen

68
Q

What are the bulbourethral glands derived from embryologically?

A

Urogenital sinus

69
Q

What are the seminal vesicles?

A

Pair of glands found in the pelvis which function to produce some constituents of semen, providing 70% of total volume

70
Q

The ducts of the seminal vesicles combine with the vas deferens to form what?

A

Ejaculatory duct

71
Q

What is a haematocele?

A

Collection of blood in the tunica vaginalis

72
Q

What is a hydrocele?

A

Collection of serous fluid within the tunica vaginalis

73
Q

What is a varicocele?

A

Gross dilation of the veins draining the testes

74
Q

What is epididymitis?

A

Inflammation of the epididymis

75
Q

What is benign prostatic hyperplasia?

A

Enlargement of prostate without presence of malignancy