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App Sci Heart

Heart structure + cardiac cycle + ecg

QuestionAnswer
Heart muscle; can initiate its own contractions myogenic
Blood with oxygen Oxygenated
Takes blood to the lungs Pulmonary artery
Largest artery in the body aorta
When arterioles allow more blood through Vasodilation
Blood lacking oxygen Deoxygenated
Brings blood from the lungs to the heart Pulmonary vein
Chamber of the heart with the thickest wall Left ventricle
Valve between the left atrium and left ventricle Bicuspid
When blood moves through the atrioventricular valves Atrial systole
When the whole heart relaxes General diastole
Cells that form the walls of capillaries Endothelium
Firm fibres in the walls of arteries and veins Collagen
Blood vessels with valves Veins
The space in a blood vessel that blood passes through Lumen
The pacemaker of the heart SAN
The middle wall of the heart, between the ventricles Septum
The conducting fibres that pass the impulse to the base of the ventricles Purkinje
Groups of Purkinje fibres Bundles of His
An extremely fast heart rate Tachycardia
A very slow heart rate Bradycardia
When the atria and ventricles contract randomly Fibrillation
The blood vessel that takes blood to the heart itself Coronary artery
The machine used to record the electrical activity of the heart Electrocardiagraph
The substance in red blood cells that carries oxygen Haemoglobin as oxyhaemoglobin
Created by: carolannaston
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