The following is not part of our bodies defense mechanism for infectious disease:
a. mucous membranes
b. red blood cells
c. white blood cells
d. antibodies

Which is an example of a food group? a. oils b. vegetables c. water d. sweets

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.

What are the five food groups recommended by the usdas my plate food guidance system