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Chapter 11: Cardio

Cardiovascular System Vocabulary Terms

Aorta: Largest artery in the body
Arteriole: Small artery
Artery: largest type of blood vessel; carries blood away from the heart to all parts of the body
Atrioventricular node: Specialized tissue in the wall between the atria. Electrical impulses pass from the pacemaker through the AV node.
Atrium: One of two upper chambers of the heart
Capillary: Smallest blood vessel. Materials pass to and from the bloodstream through the thin capillary walls
Carbon Dioxide: Gas released by body cells, transported via veins to the heart and then to the lungs for exhalation
Deoxygenated blood: Blood that is oxygen-poor
Diastole: Relaxation phase of the heartbeat
Electrocardiogram: Record of the electricity flowing through the heart
Endocardium: Inner lining of the heart
Endothelium: Innermost living of blood vessels
Mitral Valve: Valve between the left atrium and the left ventricle
Murmur: Abnormal heart sound caused by improper closure of the heart valves
Myocardium: Muscular, middle layer of the heart
Normal Sinus Rhythm: Heart rhythm originating in the sinoatrial node with a resting rate of 60 to 100 beats per minute
Oxygen: Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
Pacemaker: Speacialized nervous tissue in the right atrium that begins the heartbeat.
Pericardium: Double-layered membrane surrounding the heart
Pulmonary Artery: Artery carrying oxygen-poor blood from the heart to the lungs
Pulmonary Circulation: Flow of blood from the heart to the lungs and back to the heart
Pulmonary Valve: Valve positioned between the right ventricle and the pulmonary artery
Pulmonary Vein: One of two parts of vessels carrying oxygenated blood from the lungs to the left artrium of the heart
Pulse: Beat of the heart as felt through the walls of the arteries
Septum: Partition or wall dividing a cavity; such as between the right and left atria
Sinoatrial Node: Pacemaker of the heart
Sphygmomanometer: Instrument to measure blood pressure
Systemic Circulation: Flow of blood from body tissue to the heart and then from the heart back to body tissues
Systole: Contraction phase of the heartbeat
Tricuspid Valve: Located between the right atrium and the right ventricle
Valve: Structure in veins or in the heart that temporarily closes and opening so that blood flows in only one direction
Vein: Thin-walled vessel that carries blood from body tissues and lungs back to the heart
Vena Cava: Largest vein in the body
Ventricle: One of two lower chambers of the heart
Venule: Small vein
Created by: oxdaniellexo