Isolated Planarian Pharynx (image) Stowers Institute for Medical Research Caption Isolated planarian pharynx: two tissue types in this digestive organ are shown. In red, cilia of the epithelial layer ensheathing the organ are labeled with an antibody against acetylated tubulin. In green, the complex longitudinal and circular muscle fibers are shown as labeled by the anti-myosin heavy chain antibody Tmus-13. Credit Image courtesy of Carrie Adler, Ph.D., Stowers Institute for Medical Research Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.