The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs?
a. the salivary glands secrete enzymes that pull food out of the air pathway.
b. the small intestine pushes the air out of the digestive system.
c. the pancreas breaks down food in the air pathway.
d. the epiglottis closes the air pathway so that food will not enter it

The correct answer is  D) The epiglottis closes the air pathway so that food will not enter it.

The pharynx is the structure in the throat which serves as a pathway of both air and food. The epiglottis ( located on the top of the larynx) is a cartilaginous flap which constantly moves back and forth in order to prevent the entry of food into the lungs.  

When we swallow food, the epiglottis closes the air pathway by covering the larynx ( voice box), which is part of the respiratory system. This allows the food to enter in the esophagus and prevent from entering it in the windpipe.

Thus, the epiglottis closes the air pathway so that food will not enter it.

D

Explanation:

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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