Homeostasis is essential to maintain conditions within the tolerable limits. Otherwise, the body will fail to function p..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..