00:02
So the question asks, in the human digestive system, which is true, all types of food begin their enzymatic digestion in the mouth.
00:11
After leaving the oral cavity, the bolus enters the larynx.
00:16
The epiglottis prevents swallowed food from entering the trachea.
00:21
The esophagus is a key source of digestive enzymes.
00:26
Or the trachea leads to the esophagus and then the stomach.
00:31
So in order to look at these, we'll look at the human digestive system.
00:35
System, focusing primarily on the upper portion of it.
00:40
So you ingest your food into the oral cavity and begin to masticate or chew it.
00:50
In the mouth, we have several types of salivary glands that will inject saliva into the oral cavity.
01:00
One of the things saliva does is lubricate food, but the big one for this question is it does start to enzomatically digest some macromolecules, but mainly only simple sugars are carbohydrates.
01:19
So carbohydrates are the only ones who have any enzymatic or chemical digestion in the mouth.
01:26
All the other macromolecules are only mechanically digested through chewing.
01:33
You then swallow what is now called a bolus.
01:37
And so if we look over on the right hand side at a close -up of the throat, right? the next option was after leaving the oral cavity, the bolus enters the larynx.
01:48
The larynx is the first part of the trachea here where your vocal cords are.
01:54
And so the larynx and the trachea, so the larynx and the trachea are connected, right? the esophagus, so here we can see.
02:08
The trachea here in white and the esophagus here in orange over on the right.
02:16
Those are two separate pathways...