Usage patterns
肝臓が悪いto have a bad/unhealthy liver
My father has a bad liver, so he's cutting back on alcohol.
肝臓を壊すto damage one's liver
If you drink too much, you'll damage your liver.
肝臓の機能が低下するfor liver function to decline
The test results showed that his liver function had declined.
肝臓に脂肪がつくfor fat to build up in the liver (fatty liver)
Overeating regularly makes fat build up in the liver more easily.