yes, they are
Evolution of brain is called cephalization. Worms are found to have the simplest brain mechanism and have simple straight forward nervous system i-e head to tail.
Yes, worms consume deceased organisms as part of their diet.
Yes if the worms go into the persons brain.
101
earth worms
Worms
Worms.
marine worms
lampreys eat small critter like worms and organisms
Single-celled organisms like bacteria and archaea are considered some of the simplest organisms due to their basic structure and lack of specialized organelles. They are typically unicellular and do not contain a nucleus.
micro organisms
Worms