NCERT CLASS 11 CHAPTER 22
Chemical coordination and Integration
Chapter 22 Chemical Coordination and Integration part1, we study the introduction of chemical coordination and Integration (Endocrine system), Chemical nature of hormone, and some detail about following glands:
- Human Endocrine system
- Pituitary gland (master gland)
- the pineal gland
The endocrine system is a series of glands that produce and secrete hormones that the body uses for a wide range of functions. Chemical coordination differs than neural coordination, which one is fast but short lived.
The neural system and endocrine system jointly coordinate and regulate the physiological functions in the body. Endocrine glands lack ducts and are hence, called ductless glands. Their secretions are called HORMONES. Hormones are produced by glands and sent into the bloodstream to the various tissues in the body. They send signals to those tissues to tell them what they are supposed to do. When the glands do not produce the right amount of hormones, diseases develop that can affect many aspects of life.
WHY Pituitary gland called master gland??? Pituitary has a regulatory influence on almost all the endocrine glands of the body, hence it is called “MASTER GLAND”. the pituitary also forms interlink between nervous and endocrine system.