The adaptive immune systems play a crucial role in fighting off infections.

Binary numeral systems are widely used in computer science.

Many animals, including humans, have closed circulatory systems.

The enteric nervous systems play a crucial role in regulating digestion.

Geographic information systems are used to analyze and visualize spatial data.

Global distribution systems are widely used in the travel industry.

Hyperbolic navigation systems are used for precise positioning and navigation.

The innate immune systems are the body's first line of defense against pathogens.

The mancude-ring systems in this chemical compound are highly stable.

Mesoscale convective systems are large-scale weather systems characterized by organized clusters of thunderstorms.