InSight
The major arteries of your body branch off from the
aorta and lead to the head, arms, and trunk. The remain-
ing arteries branch off from there.
The ascending aorta branches into the right and left
coronary arteries, which supply the heart.
The arch of the aorta branches into three divisions:
The
brachiocephalic
trunk
(brake-o-se-FAL-ik;
brachio
= arm;
-cephalic
= head) leads to the right
common carotid artery, which supplies the right side
of the head and neck, and to the right subclavian
artery, which supplies the right upper limb.
The left common carotid artery supplies the left side
of the head and neck.
The left subclavian artery supplies the left upper limb.
The thoracic aorta has four branches:
The bronchial arteries supply the bronchi of the lungs.
The esophageal arteries supply the esophagus.
The posterior intercostal arteries supply the inter-
costal and chest muscles.
The superior phrenic arteries supply the superior
and posterior surfaces of the diaphragm.
The abdominal aorta branches into eight divisions:
The inferior phrenic arteries supply the inferior
surface of the diaphragm.
The celiac trunk leads to the common hepatic artery,
supplying the liver, stomach, duodenum, and pancreas.
It also leads to the left gastric artery, which supplies
the stomach and esophagus, and to the splenic artery,
which supplies the spleen, pancreas, and stomach.
The superior mesenteric artery supplies the small intes-
tine, cecum, parts of the colon, and pancreas.
The suprarenal arteries supply the adrenal glands.
The renal arteries supply the kidneys.
The gonadal arteries supply the testes (males) and
ovaries (female).
The inferior mesenteric artery supplies the rectum
and parts of the colon.
The common iliac arteries carry blood to the lower
limbs.
Within the organs the arteries divide into arterioles and
then into capillaries that service the systemic tissues (all
tissues except the alveoli of the lungs).
a.
Right
lateral
view of branches of
brachiocephalic trunk in neck and head
Right internal
carotid
Right subclavian
Right axillary
First rib
Right maxillary
Right external
carotid
Right common carotid
Right vertebral
Clavicle
Brachiocephalic trunk
b. Inferior
view
of base of
brain
showing cerebral arterial circle
ANTERIOR
Cerebral arterial
circle (circle of Willis):
Anterior cerebral
Anterior
communicating
Internal carotid
Posterior
communicating
Posterior
cerebral
Frontal lobe
of cerebrum
Middle cerebral
Temporal lobe
of cerebrum
Pons
Basilar
Medulla
oblongata
Vertebral
Cerebellum
POSTERIOR
322 CHAPTER 11
The Cardiovascular System: Heart, Blood Vessels, and Circulation
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