Download Cardiovascular Unit Outline PHYSIOLIOLOGY OF THE HEART DAY 1

Cardiovascular Unit Outline
DAY 1 (12.05)
Source: Fitness for Life, Corbin
Physiology of the cardiovascular / respiratory system:
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The Cardiovascular system is comprised of the following main components: heart, blood vessels,
blood.
The respiratory system is comprised of the following main components: lungs, air passageways,
and oxygen from outside the body.
Both systems work together to bring your body cells the materials they need to function.
DAY 2 (12.06)
Source: Fitness for Life, Corbin & Physiology of Sport and Exercise, Wilmore and Costill
Cardiovascular system organs:
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Heart:
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The heart is the size of a fist and is located in the middle of the chest cavity
The heart acts as a pump to supply oxygenated blood to the cells of your body
Because the heart is a muscle, it benefits from cardio vascular exercise
Vigorous physical exercise strengthens the muscles of the heart
2 atria chambers act as receiving chambers from veins
2 ventricles act as sending units to the blood vessels
DAY 3 (12.07)
Source: Fitness for Life, Corbin & Physiology of Sport and Exercise, Wilmore and Costill
Cardiovascular system organs (cont):
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Blood Vessels:
o Carry blood away from the heart
o Blocked vessels can lead to atherosclerosis (build-up inside the arteries blocking blood)
Veins:
o Carry blood to the heart
o One-way valves in veins keep the blood from flowing backwards
o Lack of exercise can cause valves to stop working properly
DAY 4 (12.10)
Source: Physiology of Sport and Exercise, Costill, Kenny, & Wilmore
Information regarding cardiac functions:
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Cardiac Output:
o The total volume of blood pumped in 1 minute
o The average adult body contains 5 Liters of blood
o The total amount of blood in the body in cycled through the heart every minute.
Stroke Volume:
o The volume of blood pumped per stroke (pump)
o An increase in heart rate and stroke volume increase cardiac output, therefore, more
blood is forced out of the heart during exercise than when at rest, and the circulation
speeds up. This allows for oxygen to reach muscles and organs.
DAY 5 (12.11)
Source: Physiology of Sport and Exercise, Costill, Kenny, & Wilmore
Heart rate during exercise measured by heart rate monitors
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During exercise, cardiac output increases primarily to match the need for increased oxygen
supply to the working muscles
Healthy heart:
o More blood per pump is pushed out of the heart (high stroke volume)
o Low resting HR
o Typically more physically fit
Unhealthy heart:
o More pumps with less blood each pump (low stroke volume)
o High resting HR
o Typically less fit
DAY 6 (12.12)
Late / Start First Class
TEST