The human digestive system secretes numerous chemicals that break down organic material. what are three of the safeguards that prevent us from digesting our own tissues? ?

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v

i need an image of the diagram

b. lithosphere, asthenosphere, mesosphere   is the answer most likely