臓 internal organ

The internal organs of ZOUs (象 = elephants) are hella big, dogg.

The internal organs are nothing but little warm moist storehouses full of nutrients, blood, lymph, hormones, etc.

heart ★★★☆☆
心 (heart) + 臓 (internal organ) = 心臓 (heart)

internal organ ★★☆☆☆
内 (the inside) + 臓 (internal organ) = 内臓 (internal organ)

lung ★★☆☆☆ BOOBOOFP
肺 (lung) + 臓 (internal organ) = 肺臓 (lung)

lung --PSYCHE! Unlike all other organs, lung does NOT use the '臓' suffix - it is just 肺。(BOOBOO)

liver ★☆☆☆☆
肝 (liver) + 臓 (internal organ) = 肝臓 (liver)