THE CARDIOVASCULAR SYSTEM Your “real” heart The muscular pump that makes the cardiovascular...
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Transcript of THE CARDIOVASCULAR SYSTEM Your “real” heart The muscular pump that makes the cardiovascular...
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THE CARDIOVASCULAR SYSTEM
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Your “real” heart
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The muscular pump that makes the cardiovascular system work. It is made up of cardiac muscle and provides the power needed for life.
Your heart will beat an average of 2 ½ billion times in a lifespan.
You have approximately 5 liters of blood in your body
HEART
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To pump blood to all parts of the body providing food and oxygen to all its cells.
Essential question – What is the function of the heart?
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Blood is the fluid of life. It transports oxygen and carbon dioxide, nourishment, and disease fighters to all parts of the body.
BLOOD
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The liquid portion of the blood in which all other cells, nutrients, and hormones are suspended.
Plasma is 90% water
PLASMA
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RED CELLS – carry oxygen to all parts of the body. HEMOGLOBIN is the protein in RBC’s that the
O2 combines to. It give blood its red color.
WHITE BLOOD CELLS – are part of your immune system and fight disease.
PLATELETS – clot your blood to stop bleeding.
TYPES OF BLOOD CELLS
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BLOOD VESSELS – YOUR TRANSPORTATION SYSTEM
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Carry oxygenated blood away from the heart
Two major/important arteries are: Aorta – largest artery in body that takes
blood away from the heart Pulmonary Arteries – carry
‘unoxygenated’ blood away from heart and to the LUNGS to pick up O2.
ARTERIES
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Veins return unoxygenated blood back to the heart.
Two major veins are: Superior vena cava Inferior vena cava
VEINS
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CAPILLARIES – smallest vessel in the body, where O2 & CO2 is
exchanged
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The force of blood against the arterial walls
120/80 is an average BP HYPERTENSION = a high blood pressure
count
BLOOD PRESSURE
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The number of times your heart beats per minute.
The average heart beats 70-80 times in 60 seconds.
Your heart is a muscle, so if you exercise it (aerobically), your heart will get stronger and not have to work so hard. A trained athlete’s heart would beat LESS than 70-80 times.
YOUR “PULSE”
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HEART ANATOMY
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Atrium – the upper / receiving chambers of the heart
Ventricle – the lower / pumping chambers of the heart
Valves – tiny flaps of skin that open and close like one-way doors
Septum – the muscular wall that divides the heart into a right and left side
HEART ANATOMY TERMS
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PULMONARY CIRULATION – BLOOD THAT FLOWS FROM THE HEART – TO THE LUNGS – BACK TO THE HEART
SYSTEMIC – BLOOD THAT FLOWS TO EVERY SINGLE PART OF THE BODY except the lungs
CORONARY – SUPPLIES BLOOD ONLY TO THE HEART
TYPES OF CIRCULATION