Chapter 19
The Cardiovascular System: Blood Vessels
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19
Right subclavian vein
Brachiocephalic veins
Axillary vein
Brachial vein
Cephalic vein
Basilic vein
Median cubital vein
Median
antebrachial
vein
Basilic vein
Internal jugular vein
External jugular vein
Left subclavian vein
Superior vena cava
Azygos vein
Inferior vena cava
Ascending lumbar vein
Accessory hemiazygos vein
Hemiazygos vein
Posterior intercostals
Ulnar vein
Deep venous
palmar arch
Superficial venous
palmar arch
Digital veins
Cephalic vein
Radial vein
(b) Anterior view
Hemiazygos vein
(hĕ
0
me-a-zi
9
gus; “half the azygos”).
Tis
vessel ascends on the leF side of the vertebral column. Its ori-
gin, from the
lef ascending lumbar vein
and the lower (9th–
11th)
posterior intercostal veins
, mirrors that of the inferior
portion of the azygos vein on the right. About midthorax, the
hemiazygos vein passes in front of the vertebral column and
joins the azygos vein.
Accessory hemiazygos vein.
Te accessory hemiazygos com-
pletes the venous drainage of the leF (middle) thorax and can
be thought of as a superior continuation of the hemiazygos
vein. It receives blood from the 4th–8th posterior intercostal
veins and then crosses to the right to empty into the azygos
vein. Like the azygos, it receives oxygen-poor systemic blood
from the bronchi of the lungs (
bronchial veins
).
(continued)
Table 19.11
Figure 19.28
(continued)
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