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Transport and Supply (Heart (organ pumping blood through system (size of…
Transport and Supply
Heart
organ pumping blood through system
size of your fist
base is proximal to head while apex is distal
think of it as two pumps even though its one organ
outer layer of heart; Epicardium
middle layer; Myocardium
inside layer; Endocardium
surrounded by a Pericardium
4 chambers
wall between upper; Atria is interatrial septum
wall between lower; Ventricles is interventricular septum
Cardiac Cycle
Systole
Diastole
chambers fill with blood
blood id ejected
Blood
connective tissue that has a fluid component called plasma and other cells
the cardiovascular system contains the heart, blood and blood vessels
the circulatory system contains the cardiovascular and lymphatic system
4 main functions
pump materials throughout body
carry blood to various parts of the body
deliver O2 and nutrients to cells and remove waste
return excess fluid to general circulation
Artery
carry blood away from heart
arterioles
capillaries
venules
Veins
carry blood towards heart