Flashcards
The Cardiovascular System - Flash Cards
Cards in this deck (21)
- 1The Cardiovascular SystemThe cardiac muscle cells of the wall of the heart have a unique structure in that many of them are branched as that they together form an interconnected network. Thus, they are able to act as a single functional unit.
- 2The Cardiac Cycle Is defined as......the events of one heartbeat.
- 3The Cardiac CycleIt is important to notice that the events of this cycle depend on heart structure and the pressure of blood within the chambers and blood vessels.
- 4The Cardiac CycleEach cardiac cycle takes approximately 0.8 seconds to complete:
atrial systole - 0.1 seconds
ventricular systole - 0.3 seconds
atrial and ventricular diastole (relaxation period) - 0.4 seconds - 5The Electrocardiogram (ECG) 'The P Wave'Atrial Depolarisation
- 6The Electrocardiogram (ECG) 'The QRS Complex'Ventricular Depolarisation
- 7The Electrocardiogram (ECG) 'The T Wave'Ventricular Repolarisation
- 8Coronary CirculationThere are two large vessels - the left and right coronary arteries.
- 9The left coronary artery supplies blood to......the left ventricle
- 10The right coronary artery supplies blood to the......right side of the heart - including the important conducting tissues, the SA node and the AV node.
- 11Coronary CirculationDeoxygenated blood travels through the cardiac veins, to the coronary sinus, into the right atrium and joins the pulmonary circulation.
- 12Coronary CirculationIt is during the relaxation period that the coronary vessels have time to pump blood around the heart.
- 13Blood PressureWhen the heart rate increases - the period of diastole shortens, which decreases blood flow.
- 14Blood Pressure is defined as...the pressure exerted by the blood on the wall of a vessel.
- 15Blood Pressure is highest......in the blood vessels closest to the heart (pulmonary trunk and aorta).
- 16Blood pressure refers to......The pressure in the large arteries of the systemic circulation.
- 17What is the typical value for a systolic pressure in young men?120mmHG
- 18What is the typical value for a diastolic pressure in young men?80mmHg
- 19What is the typical value for a systolic pressure in young women?110mmHg
- 20What is the typical value for a diastolic pressure in young women?70mmHg
- 21The TWO determinants of blood pressure are...Cardiac Output
and
Peripheral Resistance
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- Body Systems Flashcards on The Cardiovascular System - Flash Cards, created by Gillian13990 on 17/04/2015.
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