abdominal wall and hernia Flashcards
from the coelomic cavity what is derived
pericardium
pleura
peritoneum
tunica vaginalis
small amount of serous fluid secreted by
mesothelial lining
abdominal and thoracic cavities partitioned by the
diaphragm
diaphragm derived from
septum transversum plus muscular ingrowth
abdomen is continuous with the
pelvis - abdominopelvic cavity
abdominal cavity is lined by
mesothelial lining
what vertebral segment is uniquely mammalian
lumbar
abdominal wall is supplied by
intercostal nerves
intercostal nerve at the xiphoid
7th - last true rib
umbilicus intercostal nerve
T10
inguinal ligament intercostal nerve
L1
top middle abdominal zone
epigastric
top left
left hypochondria
top right
right hypochondria
middle
umbilical
middle left
left lumbar
middle right
right lumbar
bottom right
right inguinal
bottom left
left inguinal
bottom middle
hypogastric
vertical planes
left/right midinguinal
horizontal planes
subcostal plane
inter tubercular plane
diaphragm muscle, when relaxed, rises to
rib 5 - nipple line
pelvis inlet
boundary between abdominal cavity and pelvic cavity
external oblique
V shape
internal oblique
A shape
transverse abdominus
straight line shape
3 functions of abdominal wall
- containment/protection/strength
- respiration and voice projection
- posture/stability/movement
rectus sheath
sheath encloses rectus abdominis
anterior/superficial layer of rectus abdominis
aponeurosis of external oblique
fused with part of internal oblique
midline partition
linea alba
lateral edge
linea semilunaris
arcuate line
no fascia below this line
not always there
wall is weaker below this line
8 layers of the body wall
1. skin 2 a. camper's fascia b. scarpa's fascia 3. external oblique 4. internal oblique 5. transversalis abdominus 6. transversalis fascia 7. exztraperitoneal fat 8. peritoneum
2 types of subcutaneous fascia
camper’s - fatty fascia
scarpa’s - membranous fascia
3 layers of muscle
external oblique
internal oblique
transversalis abdominis
fascia underneath transversals abdominis
transversalis fascia
scarpa’s fascia is attached to
inguinal ligament and linea alba
below the inguinal ligament the scrapa’s facia becomes
fascia lata
scarpa’s fascia does not attach to
pubic body
inguinal canal
oblique canal through the 3 layers of the body wall
deep inguinal ring
lateral halfway point of inguinal ligament
inferior epigastric artery passes through here
spermatic cord vessels pass through the deep ring
superficial inguinal ring
medial end of inguinal ligament
testes are supplied by
B arteries
dartos muscle
wrinkles the skin of the scrotum
ingluinal canal in males contains
the spermatic cord
inguinal canal in females constables
round ligament of the uterus
what is in front of the deep ring
all three layers of abdominal muscle
foramen n transversalss fascia
what is in front of the superficial ring
tranverses and internal oblique lie behind the canal
external oblique continues into it
spermatic cord and scrotum
testes descend into the scrotum after developing in the upper abdomen
draw layers of the abdomen wall with them - except transverses abdominus
internal oblique muscle in the srcrotum gives rise to
the cremaster muscle and fascia
the spermatic cord made by
- external spermatic fascia
- cremaster muscle and fascia
- internal spermatic fascia
spermatic cord contains
loose CT and fat
the testis
processus/tunica vaginalis
hernia
increase in intraabdominal pressure can force contents through a weakness n the abdominal wall
weaknesses in the abdomen wall
- inguinal
- femoral
- umbilical
- semilunar
- oesophageal
- obturator canal
- post surgical site
things with mesentery
are more mobile
why are hernias bad
oobstruction of a tubular organ
loss of blood supply to the herniated organ
indirect inguinal hernias
herniates through spermatic cord congenital not pushed through deep and superficial rings tunica vaginalis didn't close
direct inguinal hernia
acquired was pushed weakened abdominal musculature herniates through superficial inguinal ring next to spermatic cord