What two systems work together to give cells oxygen and food?

What arrow on the map points to an air mass moving toward a cold front

Select the correct answer.which scenario describes unethical lab behavior? a.danny stores the chemicals required for his experiment in flasks and beakers.b. anna publishes the results of her experiment on the growth rate of saplings.c. jason repeatedly runs an experiment until he gets the results he desires.d. mia records her observations of an experiment precisely and accurately.resetnext

How does the nervous system affect the excretory system?