Where are endocrine glands found? a. in all vertebrates b. in all chordates c. in only mammals

Endocrine glands can be found in A. all vertebrates. Vertebrates include all animals (with a spine) that exist on our planet, as well as some types of fish. Endocrine glands secrete various hormones inside the body itself, as opposed to the exocrine system. Some endocrine glands are ovaries, testes, pituitary gland, etc.