The US Health Department has reminded residents that the “deer tick” (black-legged tick) which causes Lyme disease is already active. Even immature ticks as small as a pinhead can transmit the disease. More ticks expected from mild winter, and the direct or indirect effects of global warming might intensify the prevalence of Lyme disease. With [...]
System is an organization of functionally interactive units for the achievement of a common goal. All systems have inputs, outputs, and feedback, and maintain a basic level of equilibrium. For example, in the human body the heart functions to support the circulatory system, which is vital to the survival of the entire body.