Download Circulatory System: Blood system transporting materials in the body

Circulatory
System:
Blood system
transporting
materials in the
body
Blood:
Red Blood Cells: carries O2 & CO2
White Blood Cells: fight off disease
Plasma: carries food, protein, & nitrogen wastes
Blood Vessels:
Arteries: always carry blood away from heart;
thick walls, generally high in O2
Veins: always carry blood to the heart; thinner
walls, generally low in O2
Capillaries: connect arteries & veins; where
food, nitrogen wastes, & gases are exchanged
The heart is a muscular pump that pushes blood
through the body.
Sinoatrial node
(S-A node)
 Pacemaker (atria contract)
Atrioventricular node
(A-V node)
 Contraction (ventricles)
Systole= contraction
Diastole = rest
Blood Pressure (S/D)
(ventricles)