Things to support Animals.

1. Crustaceans, such as crab have an articulated exterior skeleton, exoskeleton for short.

1. The bodies of most animals have a stable basic framework, the skeleton which gives them their shape and posture. Attached to the skeleton are the muscles, together both form a system of levels transforming muscles action in to movement.

1. The skeleton is the most diverse organ system across the various group of animals. It is adapted perfectly to their habitats.

1. The biggest and best-known animal in the world are vertebrates. These are animals that have spinal column, and an internal skeleton, called an endoskeleton that consist mostly of hard bones.

1. The skeleton of vertebrates consists of many individual bones that are connected by joints. Strong, elastic ligaments hold the ends of bones together.

2. Bones have a special structure; they have compact, hard outer layer that enclose a sponge-like tissue made up by trabeculae, also called cancellous bone.

3. In many animals, the bone have other essential function as well.

4. They protect delicate internal organ of the body and store mineral salts needed for metabolism.

5. The bone marrow located inside the bones produce the blood cells.

pictures crdeit: freepik.com and google images.