599
CHAPTER FIFTEEN
Cardiovascular System
ing off branches to the skin, muscles, and other tissues of the
leg along the way. Some of these vessels join the anastomo-
ses of the knee and ankle. As it passes between the medial
malleolus and the heel, the posterior tibial artery divides into
the
medial
and
lateral plantar arteries.
Branches from these
arteries supply blood to tissues of the heel, instep, and toes.
The largest branch of the posterior tibial artery is the
f
bular artery,
which extends downward along the F
bula and
contributes to the anastomosis of the ankle.
Figure 15.51
shows the major vessels of the arterial system.
PRACTICE
60
Name the portions of the aorta.
61
Name the vessels that arise from the aortic arch.
62
Name the branches of the thoracic and abdominal aorta.
63
Which vessels supply blood to the head? To the upper limb? To
the abdominal wall? To the lower limb?
As the femoral artery reaches the proximal border of
the space behind the knee (popliteal fossa), it becomes the
popliteal
(pop
lı˘-te
al)
artery.
Branches of this artery supply
blood to the knee joint and to certain muscles in the thigh
and calf. Also, many of its branches join the anastomosis of
the knee and help provide alternate pathways for blood in
the case of arterial obstructions. At the lower border of the
popliteal fossa, the popliteal artery divides into the anterior
and posterior tibial arteries.
The
anterior tibial
(tib
e-al)
artery
passes downward
between the tibia and the F
bula, giving off branches to the
skin and muscles in the anterior and lateral regions of the
leg. It also communicates with the anastomosis of the knee
and with a network of arteries around the ankle. This ves-
sel continues into the foot as the
dorsalis pedis artery,
which
supplies blood to the instep and toes.
The
posterior tibial artery,
the larger of the two
popliteal branches, descends beneath the calf muscles, giv-
Inferior mesenteric a.
Inferior epigastric a.
Right common iliac a.
Internal iliac a.
External iliac a.
Deep
circumflex iliac a.
Femoral a.
Obturator a.
Superior vesical a.
Aorta
Left common iliac a.
Middle sacral a.
Iliolumbar a.
Superior gluteal a.
Lateral sacral a.
Inferior gluteal a.
Internal pudendal a.
Inferior vesical a.
Perineal a.
Inferior rectal a.
FIGURE 15.49
Arteries that supply the pelvic region. (
a.
stands for artery.)
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