Which of the following structures are regions of the lungs?
a. cilia, adenoids, mucous, epiglottis
b. frontal, maxillary, sphenoidal, ethmoidal
c. eustachian, pharynx, bronchi
d. apex, base, hilum

-hails tea

explanation:

-t poses

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )