What type of skeletal system do the majority of vertebrates have?

The majority of vertebrates possess an endoskeleton, which is an internal skeletal structure that provides support, protection for internal organs, and a framework for muscle attachment. This system is composed mainly of bone and cartilage, which allows for growth and flexibility while maintaining strength.

The endoskeletal design is advantageous because it permits larger body sizes and more complex body movements compared to other types of skeletal systems. For instance, it enables vertebrates to have a sturdy and stable structure that can support the weight of swimming, flying, or terrestrial locomotion.

Moreover, the endoskeleton allows for the continuous development and adaptation of the skeletal system throughout the vertebrate's life stages, accommodating the changes that occur in response to growth and environmental demands. This adaptability is critical for survival and efficient functioning in diverse habitats.

In contrast, exoskeletons, found in arthropods, provide rigidity and protection but do not allow for the same degree of growth without molting. Hydrostatic skeletons rely on fluid pressure and are primarily found in soft-bodied organisms, while cartilage is a component of many skeletal systems but does not form the complete structure characterizing vertebrates.