Human Skeletal System

Vertebrates are animals with an ______ centered around an axial vertebral column

Exoskeleton, which is a rigid outer shell that holds up an organism's shape; the ______, a rigid internal frame to which the organs and soft tissues attach

Cartilage is a rigid connective tissue that is found in the skeletal systems of ______ and invertebrates

In______ are other animals that lack a vertebral column, and their skeletons vary, including hard-shelled exoskeleton (arthropods and most molluscs), plated internal shells (e.g. cuttlebones in some cephalopods) or rods (e.g. ossicles in echinoderms), hydrostatically supported body cavities (most), and spicules (sponges)

Hydroskeleton, a flexible internal structure supported by the hydrostatic pressure of body ______

An ______ is a rigid internal frame to which the organs and soft tissues attach

Most ______ are animals with an endoskeleton centered around an axial vertebral column

Invertebrates are other animals that lack a vertebral column

Cartilage is a rigid connective tissue found in the skeletal systems of vertebrates and invertebrates

The ______ is a rigid outer shell that holds up an organism's shape