Transcript Your Heart…

Cardiovascular
» “Cardio-” = heart
» “-vascular” = vessel
Function
» Transport materials needed by cells
» Oxygen
» Glucose
» Remove waste materials from cells
» Carbon dioxide
» urea
» Pump (heart)
» Continuously circulates blood
Major Components
The Heart
The Blood
The Blood Vessels
THE HEART
• The heart is the most vital organ in
the circulatory system.
• About the size of your fist.
• It is made up of four main parts
called chambers.
• Left and right ventricle
• Left and right atrium
THE BLOOD VESSELS
• The blood vessels provide the pathway in
which blood travels.
• There are three types of blood vessels:
• Arteries- direct blood away from heart.
• Capillaries-very thin! Allow nutrients,
oxygen to diffuses easily through capillary
walls.
• Veins- blood vessels that direct blood back
to the heart.
THE BLOOD
» Platelets
» Clump together in damaged area of skin to help reduce blood
loss.
» Red Blood Cells
» carries hemoglobin (Gives cells their red color)
» Hemoglobin clings to oxygen and transports it through the
body.
» Blue Blood Cells
» carries waste
» White Blood Cells
» Release antibodies that destroy pathogens and clean wounds
Mmmm….Blood!!!
How everything works
together…
» Your blood carries oxygen & nutrients to all
the cells in your body.
» It also carries away the waste products like
carbon dioxide.
» The left side of the heart pumps oxygenated
blood to the body.
» The right side of the heart pumps
deoxygenated blood to the lungs where
oxygen can be absorbed by the hemoglobin
carrying red blood cells.
Movie time!
What is Blood Pressure?
» Is a measure of the force exerted by the
blood on the wall of the arteries.
» An example is 120/80 (systolic
pressure/diastolic pressure.
» Systolic pressure is the result of the contraction
of the ventricles (normal 110-140)
» Diastolic pressure is during the ventricle
relaxation (normal 70-90)
funny youtube blood pressure movie
Blood Pressure Movie
The End
Be good to your heart!