Cross-SectionalAnatomy
Plate328
CrossSectionatL3–4
Round ligament (ligamentum teres) of liver
Transverse colon
Branches of inferior epigastric vessels
Rectus sheath
Transversus abdominis aponeurosis
External oblique aponeurosis
Internal oblique aponeurosis
Mesentery of small intestine
Superior
mesenteric
vessels
Small intestine
(ileum)
Lymph
node
Ascending
colon
Right
paracolic
gutter
Tendon
of origin of
transversus
abdominis
muscle
Ilio-inguinal nerve
Iliohypogastric
nerve
Combined
Middle
Posterior
Layers of
thoracolumbar
fascia
Right genitofemoral nerve
Inferior vena cava
Anterior longitudinal ligament
Ligamentum flavum
Abdominal aorta
Spinous process of L3 vertebra
Intermesenteric (aortic) plexus
Intervertebral disc between L3 and L4 vertebrae
Erector spinae muscle
Left sympathetic trunk
Psoas major muscle
Parietal peritoneum
Psoas minor muscle
Testicular (ovarian) vessels
Latissimus
dorsi muscle
Quadratus
lumborum
muscle
Left
ureter
Left
paracolic
gutter
Descen-
ding
colon
Small
intestine
(jejunum)
External
oblique
muscle
Internal
oblique
muscle
Transversus
abdominis
muscle
Transversalis fascia
Parietal peritoneum
Greater omentum
Omental appendices
Rectus abdominis muscle
Linea alba
