10 Questions
During which phase of the cardiac cycle do the atria contract first?
Systole phase
Which valve separates the right atrium from the right ventricle?
Tricuspid valve
What is the main function of the pulmonary valve in the heart circulation?
To prevent backflow of blood into the right atrium
What sound is associated with the 'lub-dub' sequence in heart sounds?
'Lub' is associated with ventricular contraction
What event characterizes the diastole phase of the cardiac cycle?
The heart fills with blood as both atria and ventricles relax
Where does deoxygenated blood enter in the cardiac circulation?
Right atrium through the tricuspid valve
Which structure is responsible for distributing oxygenated blood throughout the body?
Left ventricle
What is the primary function of heart sounds 'lub' and 'dub'?
'Lub' marks the start of a new heartbeat cycle
Which phase of the cardiac cycle involves a pause before the next heartbeat sequence begins?
'Dub-lub' phase
What initiates each cardiac cycle by contracting first before other heart chambers?
Right atrium
Test your knowledge on the cardiovascular system by describing the heart's location and major anatomical parts, identifying major arteries and their body regions, explaining heart valve operation and defining systole, diastole, and cardiac cycle. Also, trace the pathway of blood through the heart.
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