About how often should you visit an ophthalmologist? 1.every five years
2.every two years
3.only when you have a problem with your eyes
4.every year

Many dentist offices prefer i appreciate cherries because the use of these trays or what

Me with this i need to get the answer quickly.

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.