I WILL GIVE BRAINLIST NEED HELP ASAP Goblet cells, which produce mucus, can be found in the respiratory tract. The function of these cells is to produce a sticky fluid that traps bacteria or unwanted particles. These particles are removed from the organism by the movement of the mucus and coughing. In this situation, the respiratory system works in conjunction with the
A
digestive system.

B
circulatory system.

C
skeletal system.

D
immune system.

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.