Hi today im becoming completely honest with everyone ive met online Hi I'm Yuri I suffer with D. I.D if you don't understand what that is look it up
Hi I'm eenwoo I live inside of Yuri (who is the host) but she likes to call me her older brother I'm 20 and Yuri is 17 i hope my old friends will understand that I wasn't cat fishing and I'm sorry for the misunderstanding we just didn't feel comfortable telling you guysI hope you forgive us :)

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.