Cardio Emergencies A&P 1 Flashcards
Pump blood to supply oxygen-enriched red blood cells to tissues.
Heart’s Job
incoming blood, and ventricles pump outgoing blood.
Received by Atria
keep blood flowing in the proper direction.
One-way valves
Body’s Main Artery
Aorta
Receives blood ejected from left ventricle
Aorta
system controls heart rate and coordinates atria and ventricles
Heart’s electrical system
Cardiac Muscle
myocardium
Allows Cardiac muscles to spontaneously contract
Automaticity
Controls involuntary activities
Autonomic nervous system
Sympathetic nervous system
Autonomic nervous system two parts
Fight or flight system
Sympathetic nervous system
Slows various bodily functions
Parasympathetic nervous system
must have a continuous supply of oxygen and nutrients to pump blood.
myocardium
Increased oxygen demand by myocardium is supplied by
dilation (widening) of coronary arteries.
the volume of blood ejected with each ventricular contraction.
Stroke volume
blood vessels that supply blood to heart muscle.
Coronary Arteries
start at the first part of the aorta
Coronary arteries
Supply oxygen to different parts of the body
Arteries
Arterioles and capillaries are
Smaller
connect arterioles to venules
Capillaries