What are the The concept of hormones. Properties hormones. Classification of hormones.

The human body is a complex system of organs and organ systems. These organs systems are formed from the various organs and tissues of the body. The tissues that perform similar functions give rise to organs. The body tissue in itself is a collection of multiple cells. There many types of cells present and those performing similar physiological functions come together to form tissues Even though there is a complexity and diversity observed in the different organs and tissues, the organs systems are very well connected to each other. For the coordination to exist amongst these organs and tissues, the cells must communicate with each other. This cell to cell communication is achieved through the cellular signalling. There are various classes of signalling molecules present in the body, one of which is the hormones.