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Title: cardiovascular system
Description: overview of the cardiovascular system
Description: overview of the cardiovascular system
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Blood composition:
o Plasma, water, salts, proteins
o Platelets
o Red blood cells
o White blood cells
o Bone marrow cells
Red blood cell production:
o Live 120 days
o Too few blood cells means reduced oxygen in the blood
§ Detected by kidney which releases erythropoietin into blood stream which
stimulates marrow to
Blood clotting:
o 1
...
Platelets clump at the site of the injury
o 3
...
Thrombin breaks fibrinogen into fibrin threads
o 5
...
Action potential in sinoatrial node spreads through electrically coupled cells of
atria
o 2
...
Atrioventricular node is stimulated by depolarization of atria
o 4
...
Action potentials are split into each ventricle then spread through the
ventricular mass as purkinje fibers
§ Ensures that action potentials spreads rapidly
§ Contract longer because calcium channels stay open
o 6
Title: cardiovascular system
Description: overview of the cardiovascular system
Description: overview of the cardiovascular system