essential organs
nounUK /ɪˈsɛnʃəl ˈɔːɡənz/
US /ɪˈsɛnʃəl ˈɔːrɡənz/
Body parts like the heart and lungs that you need to stay alive.
The heart and lungs are essential organs that keep your body working.
OTHER MEANINGS
2. The most important parts of a system or organization.
Good teachers are the essential organs of a strong school.
3. Organs that must be protected during surgery or injury.
Doctors take extra care to shield essential organs during the operation.
4. The core components that make something function properly.
In a machine, the motor and battery are its essential organs.