Types of Skeleton Found in Animals | Zoology
The following points highlight the three main types of skeleton found in animals. The types are: 1. Exoskeleton 2. Hydro-Skeleton 3. Endoskeleton. 1. Exoskeleton: Hard structures derived from epidermis or dermis, present outside the body and partly or almost fully enclosing it are called exoskeleton. Many fresh water protozoon secrete a chitinoid (Arcella), calcic (Elphidium) shell (Fig. 7.11); some protozoon [...]