The Heart (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
14 questions from this quiz
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Practise the questions
14 questions from this quiz
Approximately how many times does the heart contract each day?
Approximately how many times does the heart contract each day?
100,000 times
What is the main characteristic of cardiac muscle?
What is the main characteristic of cardiac muscle?
It contracts rhythmically without tiring
What is the function of the pericardium?
What is the function of the pericardium?
Reduces friction as the heart beats
What is the primary function of the septum in the heart?
What is the primary function of the septum in the heart?
Keeps oxygenated and deoxygenated blood apart
Why do the atria have relatively thin walls?
Why do the atria have relatively thin walls?
They pump blood short distances only
Why does the left ventricle have the thickest walls?
Why does the left ventricle have the thickest walls?
It pumps blood to entire body
How many flaps does the tricuspid valve have?
How many flaps does the tricuspid valve have?
Three flaps
Where is the bicuspid valve located?
Where is the bicuspid valve located?
Between left atrium and ventricle
Through which blood vessels does the right atrium receive deoxygenated blood?
Through which blood vessels does the right atrium receive deoxygenated blood?
Vena cava
Which side of the heart is involved in the pulmonary circuit?
Which side of the heart is involved in the pulmonary circuit?
Right side only
Where do the coronary arteries branch from?
Where do the coronary arteries branch from?
Aorta
Where is the SA node (pacemaker) located?
Where is the SA node (pacemaker) located?
Top of right atrium
What causes the 'lub-dub' heart sounds?
What causes the 'lub-dub' heart sounds?
Valves closing
What is the function of the AV node?
What is the function of the AV node?
Delays signal between atria and ventricles