20 Isagawa
OTO
Panuto: Sumulat ng isang
talata na may tatlo o higit pang pangungusap tungkol sa
paborito mong pagkain. Sundin ang mga pamantayan
at pormat ng pagbuo ng talata. Isulat ito sa iyong
sagutang papel.​

Check all that occur during ventricular systole. a. the av valves open to allow blood to enter the ventricles from the atria. b. the av valves open to allow blood to enter the ventricles from the atria. c. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. d. the semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. e. the semilunar valves open to allow blood to flow into the large arteries. f. the semilunar valves open to allow blood to flow into the large arteries. g. the av valves close to prevent backflow of blood into the atria.