re: and its mucilaginous qualities make it useful in treating internal inflammations and healing mucous membranes.

In the post above this (the one above the quoted one!--flat mode) i suggested that Marshmallow plants formed a sort of gelatin... and Fiberbabe uses the word based on mucilage--which is a gelatinous substance from plants-- (which some how differes from pectin, an other jelly like plant substance... )

Do these words reflect a basic chemical difference or some difference in texture that i am not aware of?

are marshmallows "Gummy" like okra? or is there a whole world of words for the vicousness in food-- (point here is not the food, but the words to describe it.)

and are there other words?
Gelatin
mucilage
pectin
????

is gelatin animal based? and what about the gelatin from "birds nest soup"-- the gelatin that lines the nest of certain sea swallows, is this a gelatin