Med Term-Module 11 Flashcards
aorta
largest artery in the body
arteriole
small artery
artery
largest type of blood vessel
atrioventricular bundle
specialized muscle fibers connecting the atria with the ventricles and transmitting electric impulses between them
atrioventricular 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
gas released by body cells, transported via veins to the heart, and then to the lungs for exhalation
coronary arteries
blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle
deoxygenated blood
blood that is oxygen-poor
diastole
the relaxation phase of the heartbeat
endocardium
inner lining of the heart
endothelium
innermost lining of the 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
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 as felt through the walls of the arteries
septum
partition or wall dividing a cavity
sinoatrial node
the 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 the 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 an 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