Flashcards in Exam 3 Deck (203)
The liver lies mostly in which abdominal regions?
right hypochondrium and epigastric region
The spleen, funds and body of stomach lie mostly in which abdominal region?
Between what two layers of the abdomen would a extravasation of urine happen? What gender is it more common in? What causes it?
Between Scarpa's facia and deep fascia of abdomen, more common in men, and trauma of spongy urethra
What comprises the rectus sheath
aponeuroses of the external oblique, internal oblique, and transversus abdominis
What structures does the rectus sheath enclose?
rectus abdominis, pyramidalis muscle, superior and inferior epigastric arteries and veins, and anterior primary rami of lower 6 thoracic nerves
What 4 vessels supply blood to anterior abdominal wall?
Superior and Inferior Epigastric, lumbar arteries, and deep circumflex iliac artery
Innervation of anterior abdominal wall
Lower 6 thoracic nerves
What forms the inguinal ligament and where does it extend to?
lower edge of the external oblique aponeurosis, and extends from ASIS to pubic tubercle
Is there a difference in diameter of inguinal canal between sexes? And what travels through it?
Yes, larger in males. Spermatic cord (males) Round ligament of uterus (female) and ilioinguinal nerve (both sexes)
What forms the conjoint tendon?
aponeuroses of internal oblique and transversus abdominis
What forms the anterior and posterior walls of inguinal canal?
Anterior: aponeurosis of external oblique, Posterior: conjoint tendon and transversalis fascia
What forms roof and floor of inguinal canal
roof: arching fibers internal oblique and transversus abdominis, floor: inguinal and lacunar ligaments
True or false, the superficial inguinal ring is made of three crura
false, made of two; lateral and medial crus
What forms the inguinal triangle?
Medially: rectus abdominis, Laterally: inferior epigastric vessels, Inferiorly: inguinal ligament
What is notable clinically about the inguinal triangle?
Area of potential weakness where direct inguinal hernias occur
In a child what direction is the inguinal canal facing?
much less oblique like in adult, more vertical
Why does the inguinal canal face obliquely in adults?
It strengthens the canal by being compressed by muscles
Are inguinal hernias more common in one sex? If so, why?
Yes, males. The males canal is larger in diameter for the spermatic cord
What is a indirect inguinal hernia? Where does it pass the inferior epigastric vessels?
Hernia that passes through deep inguinal ring, through canal, through superficial inguinal ring into groin region. Passes laterally to inferior epigastric vessels
How is a indirect inguinal hernia acquired? What percentage do indirect inguinal hernia account for?
Can be congenital or acquired through forced passage, 75%
What is a direct inguinal hernia? Where does it pass the inferior epigastric arteries? What percentage do direct inguinal hernias account for?
Punches directly through posterior wall of canal, bypassing deep inguinal ring (causes abdominal bulging)
Passes medially to vessels
Are femoral hernias more common in men or women?
The external spermatic fascia is derived from what?
external oblique aponeurosis
The cremasteric fascia is derived from what? How is it recognized
internal oblique muscle; bundles of muscle fibers
What are the bundles of muscle fibers in the cremasteric fascia collectively known as?
What is the function of the cremaster muscle?
Control temperature of sperm
What is the internal spermatic fascia derived from?
What is the ductus deferens
muscular duct which transports sperm from epididymis to ejaculatory duct
What is the pampiniform plexus of veins?
extensive network of veins, bulk of spermatic cord. Join at deep inguinal ring to form testicular vein