The valves in the heart control how quickly the blood is pumped around the body.
to make sure that something is done correctly [= check, monitor]:
The company strictly controls the quality of its products.
WORD CHOICE: WORD CHOICE: control, manage, run, be in chargeTo controlsomething means to have the power to make it work in the way that you want, usually without anyone else being able to stop you• The army controls the north of the country. • With 75% of the shares, he effectively controls the company.To managesomething means to organize the way that it works, often with responsibility for other people's work• She manages a team of software developers. • David managed a small bookstore.To runsomething such as a business means to organize it and take the important decisions about how it works, perhaps as the owner of the business• I run my own cleaning business. • Louise will be running the project.To be in chargemeans to have responsibility for a situation or activity and decide what happens in it• When the Director is away, her deputy is in charge. • He's in charge of marketing.WORD CHOICE: control, check, inspect, examine, test, monitor!! Do not use control to mean 'check' or 'test'. Use one of the following verbs:check or inspect means to look at something carefully to see if it is correct, safe, or legal• Your passports will be checked on arrival. • Safety officers inspected the building.examinemeans to look at something very carefully in order to find out more about it• Experts who examined the letter declared it a fake.testmeans to carry out an experiment or process in order to find out what qualities something has• They test blood samples for drugs. • Every car is tested to ensure that it meets high safety standards.monitormeans to keep checking or testing something over a period of time to see if it changes• Her heart rate is being monitored. • This device monitors room temperature and humidity.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.