<p><strong>Fig. 3.17.</strong> (<strong>A</strong>) Acoelom or lacking a fluid-filled body cavity (<strong>B</strong>) Coelom (<strong>C</strong>) Pseudocoelom</p>

Fig. 3.17. (A) Acoelom or lacking a fluid-filled body cavity (B) Coelom (C) Pseudocoelom

Image by Byron Inouye