viscera, bowels
臟 refers to the internal organs of the body, especially the digestive organs or bowels. It centers on the viscera as a collective concept.
臟 combines the flesh radical ⺼ with 藏, which likely contributes the sound ゾウ and carries a sense of storing or containing, fitting the idea of organs as internal containers.
The flesh radical ⺼ on the left indicates body parts, and the right side 藏 suggests something stored inside. Picture the viscera as the body's hidden storage organs.
For ゾウ, imagine a zookeeper examining the internal organs of an animal: zoo -> ゾウ, and the viscera are what's inside.