The paracrine system is a method of communication from one cell, to its neighbouring cell.
This means, the signal is produced by one cell and induces changes in other nearby cells (short distances).
There are 3 types of hormonal transport systems:
Endocrine, Paracrine, Autocrine
Exocrine glands secrete their products directly into the external environment (venom, sweat and saliva), whereas endocrine glands secrete their products into the blood stream.