Inguinal canal

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internal (deep) inguinal ring lies in transversalis fascia, just lateral to the inferior epigastric vessels
external (superficial) ring is a triangular opening in the external oblique aponeurosis that lies just lateral to the pubic tubercle

Inguinal canal boundaries
anterior wall - formed by the aponeuroses of external oblique and internal oblique muscles
posterior wall - formed by the aponeurosis of transversus abdominis muscle and transversalis fascia
superior wall- roof - formed by the arching fibers of the internal oblique and transversus abdominis muscles
inferior wall- floor- formed by the inguinal ligament and lacunar ligament

contents
male
inguinal canal transmits spermatic cord
spermatic cord contents = "FANO x 3"
Fascia
internal spermatic fascia
cremasteric fascia
contains cremaster muscle
external spermatic fascia
Arteries
testicular artery
artery to vas deferens
artery to cremaster
Nerves
ilioinguinal nerve
genital branch of genitofemoral nerve
innervates cremaster muscle
autonomics
Other
vas deferens
pampiniform plexus of veins
testicular lymphatics
female
inguinal canal transmits
round ligament of uterus
ilioinguinal nerve
does not pass through deep inguinal ring - only travels through part of the inguinal canal

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MALT
simple mnemonic to recall the borders of the inguinal canal is MALT:
The roof is formed by Muscles (internal oblique and transversus abdominis).
The anterior wall is derived from Aponeuroses (internal and external oblique aponeuroses).
The floor is formed by Ligaments (inguinal and lacunar ligaments).
The posterior wall is formed by the conjoint Tendon and Transversalis fascia.