13: saliva (option B)
14: Tongue
15: esophagus
16: stomach
17: enzymes
18: chyme
19: small intestine
Answer:
The nervous system and endocrine system is that the nervous system uses electrical impulses to send messages through neurons while endocrine glands use hormones to send messages to the target cells through the bloodstream.
Explanation:
<h2>I hope it's helpful for you</h2>
Any kind of nuts, peanut butter, and anything small out the range of children because of choking hazards.