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EKG Unit 1 Vocabulary
Terms in this set (38)
tiny sacs of lung tissue specialized for the movement of gases between air and blood
Largest artery in the body
The semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle.
the highest point
upper chambers of the heart
(atrioventricular node) region of the heart between the right atrium and right ventricle from which electrical impulses spread to the ventricles during a heartbeat
A substance that decreases the hydrogen ion concentration in a solution.
valve between the left atrium and the left ventricle.
The passages that direct air into the lungs
Bundle of HIS
a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract
inner lining of the heart
outer layer of the heart
inferior vena cava
A vein that is the largest vein in the human body and returns blood to the right atrium of the heart from bodily parts below the diaphragm.
spaces between the ribs
within the artery
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
A division of a body organ (as the brain, lungs, or liver) marked off by a fissure on the surface.
space within a tubular part or organ, such as the space within a blood vessel
space between the cranium and the roof of the mouth
Membrane surrounding the heart
carry deoxygenated blood out of the right ventricle and into the lungs
valve positioned between the right ventricle and the pulmonary artery
one of two pairs of vessels carrying oxygenated blood from the lungs to the left atrium of the heart
nerves that travel through ventricles to stimulate all of the ventricle muscle fibers
pacemaker of the heart
Divides the right and left chambers of the heart
marked with thin, narrow grooves or channels
superior vena cava
A vein that is the second largest vein in the human body and returns blood to the right atrium of the heart from the upper half of the body.
any substance that interferes with the hydrogen bonding between water molecules and thereby reduces surface tension
valve between the right atrium and the right ventricle
A flap of tissue in the heart or a vein that prevents blood from flowing backward.
largest vein in the body
Lower chambers of the heart
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