Unit 8 III Flashcards
What causes the “dub” sound?
Semilunar valves closing
What is a pulse?
An expansion and recoiling of an artery which can be palpitated
What is stroke volume?
EDV-ESV=SV
measure of effectiveness of L ventricle
amnt of blood being ejected from L ventricle
what is the blood vessel that brings blood from the head, neck, and arms into the R atrium?
Superior vena cava
When taking a BP the ___ number is on top and the ___ number is on bottom
Systolic, diastolic
Name the structures of cardiac conduction in order
SA node, AV node, AV bundle, bundle branches, perkinje fibers
The valve between R ventricle and BV leaving the R ventricle is the ____
pulmonary semilunar
The valve between the L ventricle and the bv leaving the L ventricle is the ___
Aortic semilunar
The body’s entire blood supply is circulated every ___
One minute
The pacemaker of the heart is the
SA node
What chambers of the heart receive blood from the veins
Right atrium, left atrium
The largest artery in the body extends from left ventricle and is called the
Aorta
What is the name of a blood vessel that takes oxygenated blood from the lungs to the left atrium
Pulmonary vein
What chambers of the heart are known as pumping chambers
Right ventricle, Left ventricle
What is the name of a blood vessel that takes deoxygenated blood from the r ventricle to the lungs
Pulmonary trunk
Valves are formed from the innermost layer of the heart called the
Endocardium
The “lub” sound is caused by
AV valves closing
Cardiac output is
SV x HR = CO
Arteries
Carry blood away from the heart
Veins
Carry blood toward the heart
Arterioles
Smaller, carry toward capillaries
Venules
Smaller, carry away from capillaries
What circulation route takes deoxygenated blood to the lungs where it can pick up oxygen?
pulmonary
Systole
Contraction
Diastole
Relaxation
Name of the blood vessel that brings venous blood from abdomen and legs into R atrium
Inferior vena cava
Felt on the upper surface of the foot
Dorsal pedis
Felt in the antecubital space
Brachial
Felt in the groin
Inguinal
Felt on the neck
Common carotid
Felt on lateral side of the wrist
Radial
Felt on area behind knee
Popliteal
Initiates action potential
SA node
Slight pause for atrial contraction
AV node
Conduction nerve impulse
AV bundle
Bifurcation to L and R ventricular walls
L/R bundle branches
Spreads action potential superior lay throughout the ventricular walls
Purkinje fibers
Heart rate is
The number of cardiac cycles per minute
Tunica interna
Smooth inner lining made up of endothelium
Tunica media
Middle layer composed of smooth muscle tissue
Tunica externa
Outermost, fibrous connective tissue which provides flexibility and strength
what is an atria?
Collecting chamber
What are ventricles?
Pumping chambers
AV valves:
Between atria and ventricle
SL valves:
Between ventricle and major artery
Functions of the heart
Transports O2 and CO2 Removes waste Thermoregulation Immunological Clotting
Epicardium
Outermost layer
Vena Cava
Blood towards right atrium
Pulmonary
R ventricle to the lungs
Aorta
L ventricle to body
Atrial septum
Wall between atria
Ventricular septum
Wall between ventricles
Chordae tendinae
Strings anchoring valves prevents inversion
Papillary muscles
Chordae tendinae attached, muscular projection
mid to late diastole:
Atria contract, ventricles fill
AV valves open, SL valves close
Ventricular systole
Ventricles contract, atria relax
AV valves close, SL open
Early diastole
AV remains open, SL shut
End Diastolic Volume/ EDV
Amnt of blood entering ventricle while filling
End of systolic volume:
Amnt of blood left in ventricle after contracting
Stroke volume/SV
amnt of blood ejected from L ventricle after each beat
normal HR
60-100 beats per minute
Lumen
Hollow center section, blood flows