What is the cavity within the kidney that is continuous with the ureter?

This migraine wont go away and i dont feel safe taking any more medicine for the next few hours

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.

Feral children are in their own homes. a. institutionalized c. socialized b. held captive d. isolated select the best answer from the choices provided a b c d