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Circulatory systems (Heart (Excitable cells of the Heart (Sa node (av…
Circulatory systems
Heart
in: Artery
in: ventricle
Excitable cells of the Heart
heart wall are electrically excitable
connected gap junctions
some cells have self-excitability, e.g. sinoatrial (SA) node- natural pacemaker
Sa node
av node
purkinje fibers
Protestic heart valves
last up to a year
Variation in pressure caused by position
p[2]=p[1]+phg
cardiovascular systems
Circulate blood and transport Nutrients
amino acids
Electrolyetes
Ocxygen
Carbon dioxide
Electrocardiography (ECG) eletrical activity of all cells
Vascular balloon and stent
opens artery
Blood
Capillary function
are where exchange of molecules occcur
smooth muscle cells or elastic fibers
two types
continuous
Fenestrated
Fluid exchange
1:BHP blood hydrostatic pressure
2,3:BCOP blood colleid esmotic pressure
4:BHP
