Final Assessment - Fundamentals of Animal Body Systems: Digestiv Fundamentals of Animal Body Systems: Digestive 15 of 20 __ is one of the first chemicals which starts digestion in the mouth. Bacteria Protozoa Fungi Saliva

## Step 1<br />The question is asking about the first chemical that initiates digestion in the mouth. The options provided are Bacteria, Protozoa, Fungi, and Saliva.<br />## Step 2<br />Digestion begins in the mouth, and the first chemical that initiates this process is saliva. Saliva contains enzymes that begin the process of breaking down food.<br />## Step 3<br />Bacteria, Protozoa, and Fungi are not chemicals that initiate digestion in the mouth. They are types of microorganisms and do not play a direct role in the digestion process in the mouth.