False the answer is it is false
<span>There are three parts of the body that will change suggesting a systemic disease. The first is the hands, which contain may blood vessels and a significant amount of skin surface. Nerves in the body might show signs of a systemic disease. Finally, muscles, tendons and ligaments might swell or otherwise show signs of bodily stress.</span>
Cnidarians were the first phylum that scientists saw tissue level organization in. Tissue level organization meaning cells all of one type start to function in a unified way.