The Circulatory System - University of California, Irvine

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The Circulatory System
Matin Khoshnevis
Background
• What organ circulates the blood?
• Location and components of this organ?
• Function of circulation?
• Mechanism of circulation?
Background
• The heart
• Composed of Cardiac
Muscle
• Heart rate (Hr)
Background
• Cardiac Muscle
– One of the three major type of
muscle in the body
– Oxidative
– Striated
• Highly resistant to
fatigue
– Mitochondria
– Myoglobin
Function
• Pumps blood
through the body
in a closed system,
and that after
it supplies
nutrients and
oxygen to the
cells, it returns to
the heart.
Mechanism
• What sets the Hr?
– Pacemaker
– Right Atrium
– Innervations by
Sympathetic/
parasympathetic
pathway
• How is the
heart rate set?
Mechanism

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