Chapter 11: Cardiovascular system Flashcards
Largest artery in the body
Aorta
Lower tip of the heart
Apex of the heart
Small artery
Arteriole
Largest type of blood vessel; carries blood away from the heart to all parts of the body
Artery
Specialized muscle fibers, connecting the atria with the ventricles and transmitting electrical impulses between them
Atrioventricular bundle (bundle of His (pronounced “hiss”))
Specialized tissue in the wall between the atria. Electrical impulses pass from the pacemaker (SA node) through the AV node, and the atrioventricular bundle or bundle of His toward the ventricles.
Atrioventricular node (AV node)
One of two upper chambers of the heart
Atrium (plural: atria)
Smallest type of blood vessel. Materials passed to, and from the bloodstream through these thin walls.
Capillary
Gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation
Carbon dioxide (CO2)
Two common arteries located on each side of the neck branch from the aorta and provide blood sugar, head, neck and brain. Comes from a Greek word meaning stupor because pressure on these arteries produced unconsciousness.
Carotid arteries
Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle
Coronary arteries
Blood that is oxygen-poor
Deoxygenated blood
Relaxation phase of the heartbeat
Diastole
Record of the electrical activity of the heart. The electricity is represented by waves or deflections called P, QRS, or T.
Electrocardiogram
Inner lining of the heart
Endocardium
Innermost lining of blood vessels
Endothelium
Valve between the left atrium, and the left ventricle; bicuspid valve
Mitral valve
Abnormal swishing sound caused by improper closure of the heart valves
Murmur
Muscular middle layer of the heart
Myocardium
Heart rhythm originating in the sinoatrial node with a rate in patients at rest of 60 to 100 bpm
Normal sinus rhythm
Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
Oxygen
Specialized nervous tissue in the right atrium that begins the heartbeat.
Pacemaker (sinoatrial node)
(an artificial cardiac pacemaker is an electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning)
Double-layered membrane surrounding the heart
Pericardium
Artery carrying oxygen-poor blood from the heart to the lungs
Pulmonary artery
Flow of blood from the heart to the lungs and back to the heart
Pulmonary circulation
Valve positioned between the right ventricle and the pulmonary artery
Pulmonary valve
One of two pairs of vessels, carrying oxygenated blood from the lungs to the left atrium of the heart
Pulmonary vein
Beat of the heart as felt through the walls of the arteries
Pulse
Partition or wall dividing a cavity
Septum (plural: septa)
such as between the right and left atria (interstitial septum) and right and left ventricles (interventricular septum)
Pacemaker of the heart
Sinoatrial node (SA node)
Instrument to measure blood pressure
sphygmomanometer
Flow of blood from body tissue to the heart, and then from the heart back to body tissues
Systemic circulation
Contraction phase of the heartbeat
Systole
Located between the right atrium, and the right ventricle; it has three leaflets or cusps
Tricuspid valve