CH 11 Flashcards
Aorta
largest artery in the body
arteriole
small artery
artery
largest type of blood vessel
atrioventricular bundle (Bundle of his)
specialized muscle fivers connecting the atria with 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 type of blood vessel
carbon dioxide (CO2)
gas released by the body cells transported via veins to the heart and then to the lungs for exhalation
coronary arteries
two common carotid arteries located on each side of the neck branch from the aorta and provide blood to head, neck, and brain
deoxygenated blood
blood that is oxygen-poor
diastole
relaxation phase of the heartbeat
endocardium
inner lining of the heart
endothelium
innermost lining of blood vessels
mitral valve
valve between the left atrium and the left ventricle
murmur
abnormal swishing sound caused by improper closure of the heart valves
myocardium
muscular middle layer of the heart
oxygen
gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
pacemaker
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 felt through the walls of the arteries
septum, septa
partition or wall dividing a cavity;
sinoatrial node (SA 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