1. The Circulatory system
The Transportation System

2. The Circulatory System
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Composed of heart, blood vessels and blood
Function: transport materials throughout the body to cells and take waste products away from cells

3. The Heart - the pump 4 Chambers
left and right atria receive blood to the heart
left and right ventricles pump blood away from the heart
Valves open to allow blood to pass through and close to prevent backflow
Sinoatrial node – area above the right atrium that generates a normal sinus rhythm (causes the heart to beat)

4. The Heart – the pump
s/animations/Heart/index.html

5. The Blood Vessels – the highways
Artery – carries blood away from the heart
Vein – carries blood toward the heart
Capillaries – connect arteries and veins; they are so thin that nutrients and oxygen diffuse right through them

6. The Blood – the trucks & police
nimations/The%20Blood/index.html
Composed of
plasma – yellowish liquid part of blood that carries nutrients, clotting factors, sugar, hormones, etc.
red blood cells – erythrocytes - made in the bone marrow - carry oxygen and carbon dioxide – hemoglobin gives them the red color
white blood - leukocytes – made in bone marrow, lymph tissue, thymus, spleen – defend the body against invaders
platelets - thrombocytes – aid in clotting of blood – formed in bone marrow