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Chapter 11 Chabner
Vocabulary
| Term | Definition |
|---|---|
| aorta | The largest artery in the body |
| apex of the heart | The lower tip of the heart |
| arteriole | A small artery |
| artery | The largest type of blood vessel; carries blood away from the heart to all parts of the body |
| atrioventricular bundle ( bundle of His) | Specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them |
| atrioventricular node (AV node) | Specialized tissue in the wall between atria; electrical impulses pass from pacemaker through AV node and bundle of His toward ventricles |
| atrium (plural: atria) | One of two upper chambers of the heart |
| capillary | The smallest blood vessel |
| carbon dioxide (CO2) | Waste gas released by body cells, transported via veins to the heart, and then to lungs for exhalation |
| coronary arteries | Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle |
| deoxygenated blood | Oxygen-poor blood |
| diastole | Relaxation phase of the heartbeat |
| electrocardiogram | Record of the electricity flowing through the heart |
| endothelium | Innermost lining of blood vessels |
| mitral valve | Valve between the left atrium and left ventricle; bicuspid valve |
| murmur | Abnormal swishing sound caused by improper closure of hear valves |
| myocardium | Muscular, middle layer of the heart |
| normal sinus rhythm | Heart rhythm origination in sinoatrial node with resting rate of 60-100 beats/min |
| oxygen | Gas carried by the blood from the lungs to the heart to be pumped via arteries to all body cells |
| pacemaker (sinoatrial node) | Specialized 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 vein | Carries oxygenated blood from the lungs to the left atrium of the heart |
| pulse | The beat of the heart as felt through the walls of the arteries |
| septum (plural: septa) | A partition or wall dividing a cavity, such as that between the right and left aria and right and left ventricles |
| sinoatrial node (SA node) | The pacemaker of the heart |
| sphygmomanometer | An instrument to measure blood pressure |
| systemic circulation | Flow of blood from body tissue to the heart and back |
| systole | The contraction phase of the heartbeat |
| tricuspid valve | Located between the right atrium and right ventricle; has three leaflets or cusps |
| valve | A structure in veins or in the heart that temporarily closes an opening so blood flows in only one direction |
| vein | a thin-walled vessel that carries blood from body tissues and lungs back to the heart; contains valves to prevent the backflow of blood |
| vena cava (plural: venae cavae) | The largest vein in the body; superior and inferior venae cavae return blood to the right atrium of heart |
| venule | A small vein |
Created by:
JCA
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