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Thorax

1. Pulmonary trunk (L. pulmo, lung)
   1. Right pulmonary a.
      1. Superior branch
         1. Apical segmental a.
         2. Posterior segmental a.
         3. Anterior segmental a.
      2. Inferior branch
         1. Lateral segmental a.
         2. Medial segmental a.
         3. Superior segmental a.
         4. Medial basal segmental a.
         5. Anterior basal segmental a.
         6. Lateral basal segmental a.
         7. Posterior basal segmental a.
   2. Left pulmonary a.
      1. Superior branch
         1. Apical segmental a.
         2. Posterior segmental a.
         3. Anterior segmental a.
         4. Superior lingual segmental a.
         5. Inferior lingual segmental a.
      2. Inferior branch
         1. Superior segmental a.
         2. Anterior basal segmental a.
         3. Lateral basal segmental a.
         4. Posterior basal segmental a.
2. Ascending aorta (L. aorte, to lift up)
   1. Right coronary a. (L. coronarius, a crown)
      1. Right conus a.
      2. Atrial rami (L. atrium, an entrance hall; L. ramus, a branch)
         1. SA nodal a.
      3. Right marginal branches
         anastomoses - anterior interventricular a.
      4. AV nodal a.
      5. Posterior interventricular a.
         anastomoses - anterior interventricular
         1. Posterior septal a.
   2. Left coronary a.
      1. Anterior interventricular a.
         anastomoses - right marginal & posterior interventricular a.
         1. Anterior septal a.
      2. Left conus a.
      3. Diagonal a.
      4. Left atrial rami
      5. Circumflex branch (L. to bend around)
         anastomoses - right coronary
         1. Left marginal branches
3. Arch of the aorta
   1. Brachiocephalic a.
   2. Left common carotid a. (G. karotides, to put to sleep [by compression of this artery])
   3. Left subclavian a.
      1. Thyrocervical trunk
      2. Costocervical trunk
         1. Superior intercostal a. (spaces 1 & 2)
            anastomoses - anterior intercostal a.
      3. Axillary a.
         1. Superior thoracic a.
      4. Internal thoracic a.
         1. Pericardiacophrenic a.
            anastomoses - inferior phrenic a.
         2. Anterior intercostal a. (1 - 6)
            anastomoses - posterior intercostals a.
         3. Musculophrenic a.
            anastomoses - inferior phrenic, lower posterior intercostals & deep circumflex iliac a.
            1. Anterior intercostals (7-9)
               anastomoses - posterior intercostals a.
         4. Superior epigastric a.
            anastomoses - inferior epigastric & contralateral superior epigastric a.
4. Descending (thoracic) aorta
   1. Bronchial a. (G. bronchos, windpipe)
   2. Esophageal a. (G. oisophagos, gullet)
      anastomoses - esophageal branches of left gastric
   3. Posterior intercostal a. (spaces 3-11)
      anastomoses - anterior intercostals (1 - 6), musculophrenic (lower intercostals) a.
   4. Subcostal a.
      anastomoses - lower intercostals, inferior epigastric, deep circumflex iliac & 1st lumbar a.

Abdomen

1. Abdominal aorta
   1. Inferior phrenic a. (G. phren, diaphragm)
      anastomoses - contralateral inferior phrenic, musculophrenic, pericardiacophrenic & lower intercostals a.
      1. Superior suprarenal a.
         anastomoses - middle suprarenal a.
   2. Celiac trunk (G. koilia, belly) (supplies viscera derived from the embryonic foregut)
      1. Left gastric a. (G. gaster, the belly)
         anastomoses - right gastric & short gastric a.
         1. Esophageal branches
            anastomoses - esophageal branches of aorta
      2. Common hepatic a. (G. hepar, liver)
         1. Right gastric a.
            anastomoses - left gastric a.
         2. Gastroduodenal a. (L. duodenum [digitorum], breadth of 12 fingers)
            1. R. gastroepiploic a. (L. omentum)
               anastomoses - left gastroepiploic a.
            2. Superior pancreaticoduodenal arteries (G. pankreas, the sweetbread, fr. pas [pan], all, + kreas, flesh)
               anastomoses - inferior pancreaticoduodenal & dorsal pancreatic
         3. Hepatic proper a.
            1. Left hepatic a. (left, caudate & quadrate lobes)
            2. Right hepatic a. (right & some quadrate lobes)
               1. (G. kystis, bladder, pouch)
      3. Splenic a. (G. splen)
         1. Short gastric arteries
            anastomoses - left gastric a.
         2. Dorsal pancreatic a.
            anastomoses - superior & inferior pancreaticoduodenal, & great pancreatic a.
         3. Great pancreatic a.
            anastomoses - superior & inferior pancreaticoduodenal & dorsal pancreatic a.
         4. Left gastroepiploic a.
            anastomoses - right gastroepiploic a.
   3. Superior mesenteric a. (G. mesos, middle, + enteron, intestine) (supplies viscera derived from the embryonic midgut)
      1. Inferior pancreaticoduodenal arteries
         anastomoses - superior pancreaticoduodenal, dorsal pancreatic & jejunal a.
      2. Jejunal branches (L. jejunus, empty)
         anastomoses - inferior pancreaticoduodenal & ileal a.
      3. Ileal branches (L. eileo, to roll up, twist)
         anastomoses - jejunal & ileocolic a.
      4. Ileocolic a. (G. kolon)
         anastomoses - ileal & right colic a.
      5. Right colic a.
         anastomoses - ileocolic & middle colic a.
      6. Middle colic a.
         anastomoses - right colic & left colic a.
   4. Inferior mesenteric a. (supplies viscera derived from the embryonic hindgut)
      1. Left colic a.
         anastomoses - middle colic & sigmoid a.
      2. Sigmoid a. (G. sigma, the letter S, + eidos, resemblance)
         anastomoses - left colic & superior rectal a.
      3. Superior rectal a. (L. rectus, straight)
         anastomoses - sigmoid & inferior rectal a.
   5. Middle suprarenal arteries
      anastomoses - superior suprarenal & inferior suprarenal a.
   6. Ovarian or testicular a. (L. ovarium, egg; G. orchis, testis)
      anastomoses - uterine a., or cremasteric & ductus deferens a.
   7. Renal a. (G. nephros, kidney)
      1. Segmental arteries
      2. Inferior suprarenal a.
         anastomoses - middle suprarenal a.
   8. Lumbar arteries (L. lumbus, a loin)
      anastomoses - 1 & 2 with subcostal, & 4th with iliolumbar

Pelvis

1. Common iliac a. (L. groin, flank)
   1. Median sacral a. (L. os sacrum, sacred bone)
      anastomoses - iliolumbar & lateral sacral a.
2. External iliac a.
   1. Inferior epigastric a.
      anastomoses - superior epigastric, subcostal & lumbar a.
      1. Cremasteric a.
         anastomoses - testicular & ductus deferens a.
   2. Deep circumflex iliac a.
      anastomoses - iliolumbar, superior gluteal, subcostal, musculophrenic & superficial circumflex iliac a.
3. Internal iliac a.
   1. Umbilical a. (L. navel)
   2. Superior vesical a. (L. vesica, bladder)
      1. Ductus deferens branch (L. a leading; L. deferens, to carry away)
         anastomoses - testicular & cremasteric a.
   3. Inferior vesical a.
      1. Vaginal branch (L. sheath)
         anastomoses - uterine a.
   4. Middle rectal a.
   5. Uterine a. (L. womb)
      anastomoses - ovarian & vaginal a.
   6. Obturator a. (L. obturo, to occlude or stop up)
      anastomoses - iliolumbar, medial circumflex femoral & inferior gluteal
   7. Internal pudendal a. (L. pudendus, to feel ashamed)
      1. Inferior rectal a.
         anastomoses - superior rectal a.
      2. Perineal a. (L. perineos)
         1. Posterior labial or scrotal branches (L. lip)
            anastomoses - superficial external pudendal & deep external pudendal a.
      3. Deep artery of the clitoris or penis (G. kleitoris; L. penis, tail)
         anastomoses - dorsal a.
      4. Dorsal artery of the clitoris or penis
         anastomoses - deep a.
   8. Inferior gluteal (under lower extremity)
   9. Superior gluteal (under lower extremity)
   10. Iliolumbar
       anastomoses - 4th lumbar, superior gluteal, deep circumflex iliac, obturator and lateral circumflex femoral a.
   11. Lateral sacral
       anastomoses - median sacral

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