livga gismu

x1 is a/the liver [body-part] of x2.

See also rango, betfu.

In notes:

betfu
x1 is a/the abdomen/belly/lower trunk [body-part] of x2; [metaphor: midsection].
rango
x1 is a/the body organ [body-part] of body/species x2 performing function x3.
cenrini
x1 is a/the kidney [body-part] of x2
stomaxu
x1 is a/the stomach/digestive organ of x2