what are harmons?
Hormone is a chemical substance secreted by a single cell or a collection of cells called gland. Hormones flow from gland to to another part of the body through blood to stimulate various types of metabolism. It acts as a messenger that transport signals from one cell to another. There are several hormones produced in our body including thyroxine, estrogen, progesterone, testosterone etc. Plant hormones like auxin, gibberelin, ethylene etc are called phytohormones.
A Hormone Is A Chemical Substance That Is Released By Endocrine,Exocrine Or Heterocrine Glands To There Target Site Or The Place Where They Should Act.Endocrine Glands Pour Them Directly In The Blood Stream Through Ducts.They Are Released To Stimulate There Respective Target Sites.