Inguinal Canal and Scrotum Flashcards

1
Q

What is the inguinal canal

A

Oblique passage through the lower part of the anterior abdominal wall (around 4cm long)

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2
Q

In males, what does the inguinal canal carry

A

Structure to/from the testis and abdomen, and the ilioinguinal nerve

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3
Q

In females, what does the inguinal canal carry

A

The round ligament of the uterus from the pelvis to the labia majora, and the ilioinguinal nerve

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4
Q

What is the superficial inguinal ring

A

A triangular-shaped defect in the aponeurosis of the external oblique

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5
Q

What is the deep inguinal ring

A

An oval opening in the transversalis fascia

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6
Q

Where is the deep inguinal ring located

A

Halfway between the anterior superior iliac spine and the pubic symphysis

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7
Q

What does the deep inguinal ring give origin to

A

The internal spermatic (or round ligament) fascia

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8
Q

What vessels are located medially to the deep inguinal ring

A

The inferior epigastric vessels

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9
Q

What forms the floor of the inguinal canal

A

Inferior rolled edge of the external oblique aponeurosis (inguinal ligament)

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10
Q

What forms the roof of the inguinal canal

A

Fibres of the internal oblique and transversus abdominis muscles

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11
Q

What forms the posterior wall of the inguinal canal

A

The transversalis fascia plus the conjoint tendon

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12
Q

What is the conjoint tendon

A

Structure formed from the internal oblique and transversus abdominis as they enter the pubic crest and pectineal line

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13
Q

What forms the inguinal ligament

A

The folding back of the external oblique aponeurosis

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14
Q

Where does the lacunar ligament extend to from the inguinal ligament

A

Superiorly and posteriorly to the pectineal line (superior ramus pubis)

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15
Q

What does the lacunar ligament join to

A

The thick periosteum of the pectineal line (pectineal ligament)

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16
Q

What is a hernia, and name the 2 types

A

A protrusion of tissue; direct and indirect

17
Q

What is a direct hernia caused by

A

Usually caused when the wall of the abdominal muscles becomes weak; allows a portion of the intestine to push through

18
Q

What is an indirect hernia caused by

A

Occurs when the inguinal ring fails to close up during pregnancy

19
Q

What is the spermatic cord

A

A collection of structures which pass along the male inguinal canal to/from the testis

20
Q

What are the 3 coverings of the spermatic cord

A
  1. Internal spermatic fascia
  2. Cremaster muscle (fascia)
  3. External spermatic fascia
21
Q

What nerve runs with the spermatic cord, or the round ligament of the uterus

A

The genital branch of the genitofemoral nerve

22
Q

What are the 5 main contents of the spermatic cord

A
  1. Vas deferens
  2. Testicular artery
  3. Testicular vein
  4. Lymph vessels
  5. Autonomic nerves
23
Q

What are the 3 additional structures found in the spermatic cord

A
  1. Artery of the vas deferens
  2. Genitofemoral nerve
  3. Cremasteric artery
24
Q

What is the scrotum

A

Outpouching of skin from the abdominal wall

25
Q

What does the scrotum contain

A
  1. Testes
  2. Epididymis
  3. Lower end of the spermatic cords
26
Q

What is fat replaced with in the scrotum

A

Smooth muscle - Dartos

27
Q

What is the function of the cremaster muscles

A

It raises the testes and scrotum for warmth and protection

28
Q

What is the tunica vaginalis

A

Pouch of serous membrane that covers the testes

29
Q

What path do the testes follow during the 7th/8th month of pregnancy

A

They follow the path of the gubernaculum through the inguinal canal (have the same coverings)

30
Q

What is the epididymis

A

It is where sperm are stored, and it becomes the vas deferens

31
Q

What connects the rete testis to the epididymis

A

Efferent ductules

32
Q

What do the rete testis open into

A

Straight tubules which open into the seminal vesicle lobules

33
Q

Where does lymph from the scrotal wall (and other superficial structures) drain to

A

The superficial inguinal nodes

34
Q

Where does lymph from the testis and epididymis (and other internal structures) drain to

A

The para-aortic nodes