The Circulatory
System
3 Main Functions
1.Transport Oxygen from lungs
2.Transport Carbon Dioxide to lungs
3.Carry nutrients to body
3 Main Parts
1.The Heart
2.Blood Vessels
3.Blood
Blood Vessels
1.Arteries: Carry oxygenated blood to heart
and body
2.Veins: Carry deoxygenated blood to the
heart and lungs
3.Capillaries: Connect arteries with veins
Pathway of Blood
Superior & Inferior
Vena CavaRight Atrium Right Ventricle
Pathway of Blood
Pulmonary Artery LUNGS Pulmonary
Vein
Pathway of Blood
Left Atrium Left Ventricle Aorta
Heart Animation 1
Heart Animation 2
Components of Blood
Components of Blood
• 55% is made of liquid called PLASMA
• 45% is made of solids
• Red Blood Cells
• White Blood Cells
• Platelets
Red Blood Cells
• Carry Oxygen and nutrients to the body
White Blood Cells
• Fight foreign bodies and invaders
Platelets
• Allow blood to clot when the body is
cut/injured
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