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Anatomy GIT 206 > External Male Genital Organs > Flashcards

External Male Genital Organs Flashcards

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1
Q

The Testis is what type of gland

A

Mixed:
* Endocrine: testosterone secretion
* Exocrine: Sperm secretion

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2
Q

Site of the testis

A

in the scrotum on each side of median septum suspended by spermatic cords
* Left testis is slightly lower than right testis

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3
Q

Dimentions of Testis

A
  • 5cm long
  • 2.5 cm Thick
  • 2.5cm Anteroposterior diameter
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4
Q

shape and Covering of Anterior broder of testis

A

Convex and is covered by Tunica vaginalis (serous sac)

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5
Q

Shape, covering & relations of Posterior border of testis

A
  • straight shaped
  • Partially covered by tunica Vaginalis
  • Related to Epididymis lateraly & vas deferens medially, with a space between it and epididymis called epididymis Sinus
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6
Q

Enumerate Coverings of the Testis

A

3 Special coverings:
1. Tunica Vaginalis
2. Tunica Albuginea
3. Tunica Vasculosa

3 Spermatic Cord coverings:
1. Internal Spermatic Fascia
2. Cremastric Muscle & fascia
3. External Spermatic fascia

3 Cutaneous & subcutanous:
1. Skin
2. Dartos Muscle
3. Colles fascia (Superficial fascia Membranous layer)

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7
Q

Tunica Vaginalis represents

A

Presistent lower part of processus Vaginalis (after making Inguinal canal)

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8
Q

Layers of Tunica Vaginalis and what they cover

A
  • Visceral Layer: covers testis except Posterior part
  • Parietal Layer: lines the scrotum
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9
Q

Upper end of Tunica Vaginalis is connected to

A

Peritoneum by Vestigue (obliterated proximal part of Proccesus Vaginalis)

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10
Q

Lateral recess found between Epididymis & Testis is called

A

Epididymis Sinus

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11
Q

Accumulation of fluid in Tunica Vaginalis cavity is called

A
  1. clear serous fluid: Hydrocele
  2. Blood: haematocele
  3. Lymph: Chylocele
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12
Q

Failure of Processus vaginalis obliteration may lead to

A
  • Congenital Oblique inguinal Hernia
  • Congenital Hydrocele
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13
Q

Role of Posterior part of Tunica Albuginea

A

It’s thickened, which forms testis mediastinum, which sends septa inside testis, dividing it into 200-300 lobules

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14
Q

Tunica Albuginea covers

A

All of testis

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15
Q

Tunica Albuginea lays deep to

A

Visceral part of Tunica vaginalis

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16
Q

site of Tunica Vasculosa

A

It’s the innermost vascular coat lining testicular lobules

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17
Q

Decribe the Arterial Supply of testis

A

Testiular A:
* it originates from Abdominal Aorta at level of upper border of L3 Vertebra
* It Descends in front of Psoas Major & ureter
* It reaches Deep inguinal ring & descends as one of Contents of spermatic cord

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18
Q

Describe venous Drainage of Testis

A

Pampiniform Venous plexus:
* Collects veins into 4-8 veins at superficial inguinal Ring
* These veins unite into 2 venae commitnates around Testicular A at Deep inguinal Ring
* these 2 Veins drain into Testicular V
* Left testicular vein ends Into renal Vein at a right angle, while Right testicular Vein ends into IVC at an acute angle

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19
Q

Explain why Varicocele occures more commonly on left side

A
  • Left testicular V longer than right
  • Left Testicular V terminates at a Right angle, right V at a Left angle
  • Left testicular V compressed by Heavy pelvic Colon
20
Q

Lymphatic Drainage of Testis

A

Para-Aortic L.N

21
Q

Nerve supply of the testis

A

Sympathetic Innervation only, through 10th Thoracic Segment

22
Q

Vasa Efferentia (efferent ductules) Begins as

A

15-20 tubules arising from rete testis (network of tubes)

23
Q

Vasa Efferntia ends as

A

by Conical dilations, which fuse together to form head of Epididymis

24
Q

Site of Epididymis

A

Posterolateral to Testis

25
Q

Length of epididymis

A
  • Coiled: 5cm long
  • Uncoiled: 6m Long (like small intestine)
26
Q

Function of Epididymis

A

Sperm reservoir

27
Q

Tail of Epididymis continues as

A

Vas deferens

28
Q

Arterial Supply of Epididymis

A
  • Testicular A
  • Artery of Vas
29
Q

Venous drainage of Epididymis

A

Pampiniform venous plexus

30
Q

Lymphatic drainage of Epididymis

A

Para-Aortic L.N

31
Q

Length of Vas deferens

A

45cm

32
Q

Vas deferens connects

A

Epididymis to Ejaculatory duct

33
Q

Begining of Vas deferens

A

End of Tail of Epidimyis

34
Q

Relation of Vas deferens to Testis

A

It ascends posteromedial to testis

35
Q

Ending of Vas deferens

A

reaches deep inguinal ring, reaches back of Urinary bladder and end as dilatation called vas ampulla

36
Q

Arterial Supply of Vas deferens

A

Artery of Vas (from Inferior Vesical A)

37
Q

Structures inside Spermatic Cord

A

3 Arteries:
* Testicular Artery (from Abdominal Aorta)
* Artery of Vas (from Inferior Vesical A)
* Cremastric Artery (from inferior epigastric A)

3 Nerves:
* Cremastric Nerve (from genital Br of Genitofemoral N = L1)
* Ilio-inguinal Nerve (L=1)
* Sympathetic Plexus (T10 thoracic segment)

4 Structures:
* Vas deferens
* Pampiniform Venous Plexus
* Lymphatics
* Vestigue of Proccessus Vaginalis

38
Q

Enumerate coverings of Spermatic Cord

A
  • Internal Spermatic Fascia: From fascia transversalis at deep inguinal Ring
  • Cremastric Muscle & fascia: from Internal Abdominal Oblique
  • External Spermatic Fascia: from External Abdominal Oblique ms Aponeurosis at Superficial Inguinal ring
39
Q

Round ligament of Uterus is derived from

A

Fetal Gubernaculum

40
Q

Round ligament of uterus ends by

A

Attachement to labia majora

41
Q

Scrotum is divided externally into 2 by

A

Median Raphe

42
Q

Scrotum is divided internally into 2 by

A

Median Septum

43
Q

Corrugation of scrotum is formed by

A

Dartos Muscle

44
Q

Enumerate layers of Scrotum from outside inwards:

A

7 (like testis but without Tunica Albugenia & vasculosa):
1. Skin
2. Dartos Muscle
3. Colles Fascia (superfical membramous fascia)
4. External Spermatic Fascia
5. Cremastric Muscle
6. Internal Spermatic Fascia
7. Tunica Vaginalis (parietal Part)

45
Q

Arterial supply of Scrotum

A
  • Scrotal Artery: from internal pudendal A
  • Cremastric Artery: inferior epigastric A
  • Spuerfical External Pudendal Artery: femoral A
  • Deep External Pudendal Artery: femoral A
46
Q

Lymphatic Drainage of Scrotum

A

Superfical Inguinal LN

47
Q

Nerve supply of Scrotum

A

Sensory:
* Anterior 1/3 (lumbar): ilio-inguinal N & genital br of Genitofemoral N
* Posterior 2/3 (sacral): Scrotal br of Pudendal N & perineal br of Post.cutaneous N of thigh

Motor: sympathetic to dartos muscle through Cremastric N (of genitofemoral)

Anatomy GIT 206 (26 decks)

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