I tidy up my room every day.

The students are learning to use different operating systems.

Scientists are studying the immune systems to develop new vaccines.

Physical exercises help to keep the lymphatic systems active.

The solar systems in our universe are very different from each other.

Hormones are produced by the endocrine systems of the body.

Experts are studying the different electoral systems.

Alarm systems protect the house from intruders.

Open systems foster innovation and collaboration.

Closed systems are important for maintaining process efficiency.