The spinal cord begins at the occipital bone and extends down to the space between the first and second lumbar vertebrae; it does not extend the entire length of the vertebral column.
Earthworms are invertebrates, lacking a skeleton. To support and shape the body, they are filled with coelomic fluid. Earthworms sometimes appear to have a belt or saddle around their bodies; this is a clitelum, a structure containing maturing eggs.
The Earthworm. Phylum: Annelids. INTEGUMENTARY. The earthworm's integumentary system is similar to Human's respiratory system. It uses diffusion/osmosis to rid of carbon dioxide, and take in oxygen. Texture : The earthworm's texture is always moist with mucus. this mucus assists with diffusion, as well as movement.