Part II. Inguinal Region, spermatic cord, scrotum pg 40-44 Flashcards
The region between ASIS and pubic tubercle?
Inguinal region
Oblique, inferomedially oriented passage along lower anterolateral abdominal wall that is 4cm long, parallel and superior to the inguinal ligament?
Inguinal canal
What does the inguinal canal contain?
- spermatic cord in males
- round ligament in females
- blood vessels, lymphatics and ilioinguinal nerve
Structure that is about 1cm superior to middle portion of Inguinal Ligament, lateral to Inferior Epigastric A and inferior to Transversus Abdominis M.
Deep (Internal) Inguinal Ring
What is the Internal location of evaginated Transversalis Fascia?
Deep (Internal) Inguinal Ring
Slit-like opening in inferomedial portion of External Oblique Aponeurosis that is located superolateral to Pubic Tubercle
Superficial (External) Inguinal Ring
Lateral margins of superficial inguinal ring are called ______.
crura
The lateral crus of the superficial inguinal ligament attaches to ________.
Pubic tubercle
The medial crus of the superficial inguinal ligament attaches to ________.
Pubic crest
What spans between the 2 crura of the superficial inguinal ring to prevent separation?
Intercrural fibers
Anterior wall of inguinal canal
External Oblique aponeurosis
Posterior wall of inguinal canal
Transversalis Fascia - Reinforced by conjoint tendon
Roof of inguinal canal
Internal Oblique and Transversus Abdominis muscle/aponeuroses
Floor of inguinal canal
Inguinal L (i.e., rolled aponeurosis of External Oblique M)
Where do testes develop?
Testes develop in transversalis fascia of posterior abdominal wall, attached to anterior abdominal wall (at site of deep ring) by gubernaculum, which persists as scrotal ligament
What is the peritoneal diverticulum traversing the inguinal canal carrying muscular/fascial layers that will form around the spermatic cord and testis?
Processus vaginalis
The distal secular portion of the processes vaginalis will persist as __________.
parietal/visceral Tunica Vaginalis
What is the spermatic cord?
A structure that contains structures passing to/from testis. It begins at deep ring, passes through inguinal canal and superficial ring, ends at testis
What fascial layer of the spermatic cord is derived from evaginated External Oblique aponeurosis and investing fascia?
External Spermatic fascia
What fascial layer of the spermatic cord is derived from evaginated Internal Oblique investing fascia?
Cremasteric fascia
The cremaster muscle is derived from what?
from evaginated Internal Oblique M
What fascial layer of the spermatic cord is derived from evaginated Transversalis Fascia?
Internal Spermatic fascia
What is the function of the cremaster muscle?
Raises/lowers testis in scrotum in response to temperature to help maintain optimal temperature to support spermatogenesis
How is the cremaster muscle innervated?
Genital branch of Genitofemoral N (L1, L2)
What are the constituents of the spermatic cord?
- ductus deferens (Vas Deferens)
- testicular artery
- ductus deferens artery
- cremaster artery
- pempiniform venous plexus
- autonomic nerve fibers
- genital branch of genitofemoral nerve
- lymphatics
What is the function of the Ductus Deferens (Vas Deferens)?
Conveys sperm from Tail of Epididymis to Ejaculatory Duct