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Chapter 11 Vocab
vocabulary words chapter 11
| Term | Definition |
|---|---|
| aorta | largest artery in the body |
| apex of the heart | lower tip of the heart |
| arteriole | small artery |
| artery | largest blood type of blood vessel |
| atrioventricular bundle (bundle of His) | specialized muscle fibers connecting the atria with the ventricles and transmitting electrical impulses between them. His is pronounced "hiss" |
| atrioventricular node (AV node) | specialized tissue in the wall between the atria. |
| atrium (atria) | one of two upper chambers of the heart |
| capillary | smallest blood vessel. material pass to and from the bloodstream through the thin capillary walls |
| carbon dioxide | Gas waste. 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 lining of blood vessels |
| mitral valve | valve between the left atrium and the left ventricle bicuspid valve |
| murmur | abnormal swishing sound caused by improper closure of the heart |
| myocardium | muscular middle layer of the heart |
| normal sinus rhythm | heart rhythm originating in the sinoatrial node with a rate in the patients at rest of 60-100 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 (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 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 pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart |
| pulse | beat of the heart as felt through the walls of the arteries |
| septum (septa) | partition or wall dividing a cavity |
| sinoatrial node (SA node) | pacemaker of the heart |
| shygmomanometer | instrument to measure blood pressure |
| systemic circulation | flow of blood from the body tissue to the heart and then from the heart back to body tissues |
| systole | contraction phase of the heartbeat |
| tricuspid valve | located between then right atrium and right ventricle |
| valve | structure of veins or in the heart that temporarily closes an opening so that blood flows in only one direction. |
| vein | thin-walled vessel that carries blood from the body tissues and lungs back to the heart. veins contain valve to prevent backflow of blood |
| vena cava (venae cavae) | largest vein in the body |
| ventricle | one of two lower chambers of the heart |
| venule | small vein |