Blood Circulation (of The Back) Flashcards
Small arteries + veins accompany dorsal rami forming segmentally arranged _____.
Neurovascular bundles
In the thoracic region, arteries are dorsal branches of ______.
Posterior intercostal arteries
In the lumbar region, arteries are dorsal branches of:
4 paired lumbar arteries
Post. Intercostal arteries (except first 2) + lumbar arteries are branches of the
Descending Aorta
The accompanying veins of the intercostal arteries are called. What about veins accompanying lumbar arteries?
Intercostal veins, lumbar veins
The circulatory system includes 4 components:
Arteries, Veins, Lymph vessels + nodes, Heart
2 sides of the heart function independently, what does each side receive + send/return?
Right: receives de-oxygenated blood + sends to lungs
Left: receives oxygenated blood from lungs and returns it to body
Define Anastomoses
These may occur at the _____ level btwn arterial + venous systems
Arteries branch to _____ which give rise to _____.
Connection btwn blood channels (union of blood channels)
Capillary
Arterioles, capillaries
What are capillaries?
Capillaries connect _____ to _____
Single cell layer thick where exchange btwn blood + tissue cells occur.
Arterioles to Venules
What are venules and what do they do?
Small veins that drain to large veins
Anastomoses may also occur btwn larger venous/arterial channels. What is this pattern of circulation termed? Define it.
Collateral circulation - alternative route of circulation created by anastomoses
Collateral circulation is frequent around ____ of the ____
Joints of the limb
Anastomostic vessels proceeding sup. —> inf. Are known as
Collateral vessels
Anastomostic vessels proceeding inf. —> sup. To anastomose (connect) w/ collateral vessels are known as
Recurrent vessels
Name the two circulatory roots of the blood system
Pulmonary + systemic
Define the progression of blood thru the pulmonary circulation
Right ventricle —> lungs —> left atrium
Define the progression of blood thru the systemic circulation
Left ventricle —> body —> right atrium
Define the Aorta (where does it exit?)
Largest artery
(Exits L. Ventricle)
Name the 3 branches of the Aorta
Ascending + Descending Aorta, Arch of Aorta
The ascending aorta is comprised of what 2 arteries? These supply heart tissue directly
R + L Coronary Arteries
Name the 3 branches of the Arch of the Aorta
Brachiocephalic trunk
L. Common Carotid A.
L. Subclavian A.
The Brachiocephalic Trunk is only on the __ side and can be subdivided into 2 arteries:
Right
R. Subclavian A.
R. Common Carotid A.
The Common Carotid Arteries lead to what artery?
Occipital A.
The Subclavian Arteries lead to what 3 subdivisions?
Vertebral A. (Supplies brain thru trans. Cervical foramen)
Thyrocervical Trunk
Costocervical Trunk
