Abdomen testis layers

Question 1

Layers of the anterolateral abdominal wall

Answer 1

descent of testes from posterior abdominal wall to scrotum

inguinal canal

spermatic cord

deep and superficial inguinal rings

Question 2

layers of the abdominal wall (muscles, fascia etc)

Answer 2

Superficial –> deep:
skin
subcutaneous tissue
external oblique mus.
internal oblique mus.
transversus abdominus mus.
Transversalis function
extraperitoneal fat
peritoneum

Question 3

layers surrounding and separating rectus abdominis Mus

Answer 3

surrounding: Retus sheath
separating: linea alba

Question 4

describe the characteristics of inguinal canal

Answer 4

• oblique pathway – 4 cm long
• travels inferior and medially through inferior AL wall
• travels with medial half of inguinal ligament
• formed by drop of testicles in fetal development
• route of structures from abdomen to scrotum

Question 5

Entrance (start) and exit (end) of inguinal canal

Answer 5

entrance: deep inguinal ring (in external oblique)
exit: superficial inguinal ring ( in internal oblique)

Question 6

Content of inguinal canal

Answer 6

spermatic cord –> males
round ligament of uterus –> females

Question 7

what are the facia covering of the spermatic cord and testis derived from

Answer 7

anterolateral abdominal wall during prenatal drop of testis

Question 8

List the structures of the AL wall and their fascial coverings (from superficial to deep)

Answer 8

skin – scrotum
superficial fascia – scrotum
external oblique – external spermatic
internal oblique – cremaster muscle
transversus abdominis – no covering
fascia transversalis – internal spermatic
extraperitoneal fat – no covering
peritoneum – tunica vaginalis

Question 9

Decent of testis

Answer 9

peritoneum – envagnitates–> processus vaginalis – obliterates –> tunica vaginalis (visceral and parietal)

Question 10

process of the decent of testis

Answer 10

processus vaginalis and gubernaculum create pathway in inguinal canal

testis travel down gubernaculum –> deep inguinal ring and processus vaginalis closes

Question 11

spermatic cord covering and what parts of AL they are derived from (superficial to deep)

Answer 11

external spermatic fascia – aponeurosis of external oblique muscle

cremasteric fascia – internal oblique

internal spermatic fascia – fascia transversalis

Question 12

layers associated with tunica vaginalis (superficial to deep)

Answer 12

parietal layer of TV
visceral layer of TV
Tunica albuginea (capsule of testis)