In sexual reproduction, the and join to create a
a.
zygote, sperm, egg
c.
sperm, egg, zygote
b.
zygote, egg, sperm
d.
none of the above

What is the overall purpose of the menstral cycle

Which type of nerve creates a 'mental map" of the relative positioning of the body at any given point in time?

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.