STD 11 - 15. Body fluids and criculations — BIOLOGY STD 11 Science — Question
Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 15. Body fluids and criculations1 Mark
MCQ
Systole refers to the contraction of
A
$SA$ node
B
$AV$ node
C
Major arteries
✓
Atria and ventricles
✓
Answer
Correct option: D.
Atria and ventricles
d (d) Systole refers to contraction of atria $(atrial\ systole)$ which propels blood into ventricles and contraction of ventricles $(ventricular\ systole )$ expels blood into aorta and pulmonary artery.
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