PATTERNS OF CIRCULATION
Blood moves through the body in a
continuous pathway, of which there are
TWO MAJOR PATHS; THE PULMONARY
AND SYSTEMIC CIRCULATION.
THE PULMONARY CIRCULATION
• CARRIES BLOOD BETWEEN THE HEART AND
THE LUNGS. THIS CIRCULATION BEGINS AT
THE RIGHT VENTRICLE AND ENDS AT THE LEFT
ATRIUM
• 3. Oxygen-Poor blood is pumped out of the Right
Ventricle of the Heart into the Lungs through the
Pulmonary Arteries. These are the only Arteries
in the Body to Carry Deoxygenated Blood.
• 4. Blood returns to the Heart through the
Pulmonary Veins, the only Veins to carry oxygenrich blood.
• 5. THE LUNGS ARE THE ONLY ORGANS DIRECTLY
CONNECTED TO BOTH CHAMBERS OF THE HEART.
THE SYSTEMIC CIRCULATION
• STARTS AT THE LEFT VENTRICLE AND ENDS AT
THE ATRIUM, CARRIES BLOOD TO THE REST OF
THE BODY.
• 7. Oxygen-rich blood leaving the Heart passes
through the Aorta and into a number of Arteries
that supply blood to every part of the body.
• 8. SYSTEMIC CIRCULATION SUPPLIES EACH
MAJOR ORGAN WITH BLOOD, INCLUDING THE
HEART.
• 9. The Heart receives its supply of Blood from a
PAIR of CORONARY ARTERIES leading from the
Aorta. Blood enters into Capillaries that lead to
Veins through which blood returns to the Right
Atrium.
The Systemic System can be divided
into THREE SUBSYSTEMS:
• A. CORONARY CIRCULATION - SUPPLIES BLOOD TO THE
HEART.
•
B. RENAL CIRCULATION - SUPPLIES BLOOD TO THE
KIDNEYS. Nearly one-forth of the blood that is pump
into the Aorta by the Left Ventricle flows to the
Kidneys. The Kidneys Filter Waste From the Blood.
•
C. HEPATIC PORTAL CIRCULATION - Nutrients are
picked up by capillaries in the small intestines and are
transported to the Liver. Excess nutrients are stored in
the Live for future needs. The Liver receives
oxygenated blood from a large Artery that branches of
the Aorta.