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1. Ocellus
2. Auricle
3. Anterior branch of intestine
4. Gut diverticula
5. Areas of dispersed
and concentrated pigment
6. Mouth
7. Everted pharynx (proboscis)
8. Posterior branch (2) of intestine
Figure B: Planarian
Section through pharynx
Figure A: Dugesia tigrina
diagrammatic representation
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Figure C: Planarian
Cross-section greatly magnified diagrammatic
1. Dorsal epidermis with
many rhadbites
2. Pharynx (proboscus)
3. Pharyngeal pouch
4. Posterior branch of intestine
5. Mouth, obliquely cut
6. Nerve Cord
7. Ciliated ventral epidermis
8. Diverticula of intestine
9. Parenchyma
10. Longitudinal muscle fibers
11. Circular muscle layer
1. Lumen of pharynx
2. Cilia of epithelial cells
lining lumen
3. Longitudinal muscle fibers
(longitudinal section)
4. Longitudinal muscle fibers
(cross section)
5. Glandular cells
6. Circular muscle fibers
7. Pharyngeal pouch
8. Mouth, cut obliquely
9. Parenchyma (mesenchyme cells)
10. Rhabdite (rod-shaped structure
present in epidermis of flatworms)
11. Ciliated ventral epidermis
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Area of Figure C
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© 2021 Ward' s Science. All rights reserved. Rev. 2021
