Atria contract (atrial systole), Blood flows from atria into ventricles, Ventricles contract (ventricular systole), AV valves close (lub sound), Blood is pumped into aorta and pulmonary artery, Semilunar valves close (dub sound), Ventricles relax (diastole), Heart fills with blood again.

by

Leaderboard

Visual style

Mga Option

AI Enhanced: This activity contains content generated by AI. Learn more.

I-switch ang template

I-restore ang gi-autosave: ?