The visceral skeleton is a complex structure that provides support to internal organs. However, there are several synonyms for the term which can be used to describe the same structure. The first of these is the splanchnic skeleton. This term is often used in reference to the visceral skeleton of fish and amphibians. Another synonym is the cartilaginous skeleton, which refers to the cartilage structures that support the visceral organs in sharks and other cartilaginous fish. The last synonym is the endoskeleton which is the skeleton found inside the bodies of vertebrates. These synonyms can help to clarify the complexities of the visceral skeleton while providing more options for describing the structure depending on the context.