Download Circulatory Physiology - Kirchner-WHS

Circulatory Physiology
Circulatory System
• Transports oxygen
and other nutrients
to every cell
• Carries away carbon
dioxide and other
waste products
• Various factors
affect the rate of
circulation
Blood Pressure
• Blood moving through the blood
vessels exerts pressure against the
vessel walls
• Highest in aorta and decreases as it
moves through arterioles,
capillaries, venules, and veins
Blood Pressure
• Measure of the pressure of
the blood against the walls
of a blood vessel
• Systolic pressure—pressure
in the artery during the
ventricular contraction
• Diastolic pressure—
pressure in the artery when
the ventricles are relaxed
Pulse
• Expansion of the arteries with each
contraction of the heart
• Measured in beats per minute
Experiment
• Exercise or other activities affect rate of
circulation
• The efficiency of the circulatory system is
related to individual’s health
• You did 5 different fitness tests and assigned
points based on the results
• Pulse and blood pressure are lower and return
to resting more quickly in more fit individuals
Results
• Why does physical activity raise hr?
• Why is hr lower in fitter individuals?
• Why do some people feel faint when they go
from lying down to standing?
• How and why does hr change with body
position?
• How would you describe a “fit” individual?