Chemical Coordination and Integration Endocrine glands:  These are ductless glands that secrete hormones directly into the bloodstream. Hormones:  non-nutrient chemicals, synthesized in trace amounts, act as intracellular messeng…

Neural Control and Coordination Action potential :  A sudden change in the electrical charges in the plasma membrane of a nerve fibre. Aqueous humour :  The thin watery fluid that occupy space between lens and cornea in eye. Blin…

Locomotion and Movement Arthritis :  An enflamm atory joint diease characteresed by enflammation of joints. Coccyx :  tail bone formed by fusion of four coccygeal vertebrae in man. Dicondylic Skill :  A Skull with two occipital c…

Excretory Products and their Elimination Ammonotelism :  The animals which excrete ammonia are called ammonotelic and excretion of ammonia is known as ammonotelism eg Amoeba, sycon, hydra, liver fluke, tapeworm, Leech, Prawn, bon…

Body Fluids and Circulation Blood:  A special connective tissue that circulates in principal vascular system of man and other vertebrates consisting of fluid matrix, plasma and formed elements. Plasma :  The liquid part of blood…