Noun. 1. mucosa-mucus-secreting membrane lining all body cavities or passages that communicate with the exterior. mucous membrane. conjunctiva-a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid.oun. 1. mucosa-mucus-secreting membrane lining all body cavities or passages that communicate with the exterior. mucous membrane. conjunctiva-a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid.
Relations vs Functions. In mathematics, relations and functions include the relation between two objects in a certain order. Both are different. Take, for instance, a function. A function is linked with a single quantity. It is also associated with the argument of the function, input, and value of the function, or otherwise known as the input.
Tweet. Key difference: In mathematics, an equation is used to denote the equality between two expressions. A function, on the other hand, is in much more complex than an equation. A function is used to denote a relation between a set of inputs and a set of corresponding outputs. Essentially, an input should give a single output. A function is a relationship between two variables.