00:01
Okay, i drew a side profile of a human to help us see the answer options a little more clearly and understand this question.
00:07
So the question is, if the digestive and respiratory tracts were completely separate in humans, there would be no need for a swallowing, b, a nose, c, epiglottis, d, diaphragm, or e, all of these are correct.
00:25
Well, in order to answer this question, we need to know the function of each of these.
00:30
A, swallowing.
00:32
In order to get nutrients into our body, we have to be able to break down that food or that water and swallow it so it gets into our digestive tract.
00:40
So even if these processes were separate, we would still need to swallow in order to get it into our body.
00:46
Same thing with respiration.
00:49
We breathe air in through our nose.
00:51
So we're going to breathe that air in.
00:53
It's going to go through these systems, fill up our luns, and we're able to use that oxygen for our body...