risna gismu

x₁ is a/the heart [body-part] of x₂; [emotional/shape metaphors are NOT culturally neutral].

(adjective:) x₁ is cardiac; emotional 'heart' (= cnise'i). See also pambe, ciblu.

In notes:

ciblu: x₁ is blood/vital fluid of organism x₂.
pambe: x₁ is a pump/injector [tool/apparatus] pumping/inserting fluid x₂ to x₃ from x₄ by means x₅.
blufle: f₁ is blood flow/circulation of vital fluid f₂=c₁ of organism c₂, flowing in direction to/towards f₃ from direction f₄.
blutu'u: t₁ is a vessel with blood/vital fluid c₁ of organism c₂.
rilsletei: x₁ is tempo of rhythmic movement x₂ with the unit x₃; x₁ is a time interval and corresponds to the unit x₃ of a form of rhythm of x₂.
risnyrilti: x₁ is the heart rate / heartbeat of x₂ with the unit (default 1) x₃
cenrini: x₁ is a/the kidney [body-part] of x₂
rinsita: x₁ is a heart symbol / is heart-shaped ( ♥ )
stomaxu: x₁ is a/the stomach/digestive organ of x₂