Voorbeelden van endoskeleton

• The vertebrate is basically an endoskeleton made up of two types of tissues (bone and cartilage).

• In other echinoderms, the endoskeleton is associated with a layer of muscle that allows the animal to move its arms or other body parts.

• The endoskeleton shows a large or complete lack of ossification.

• However, eriptychiids differ from all other pteraspidomorphs in having a massively calcified endoskeleton, pervaded by canals for blood vessels.

• They form part of the endoskeleton and provide rigidity and protection.

• The pores are perforations in the endoskeleton through which podia for gas exchange project from the body.

• The dermis contains an endoskeleton of calcium carbonate components known as ossicles.

• Keyhole sand dollars are so named because of the distinctive keyhole-shaped perforation toward the rear of the endoskeleton.