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Pseudobiceros bedfordi (Laidlaw 1903)

Persian Carpet Flatworm

Cheryl Tan Kay Yin (2013)



Fact Sheet



Physical Description


Life History & Behaviour


Phototaxis Experiment


Feeding & Nutrition

Anatomy & Physiology

Skeletal System

Sensory System

Muscular System

Digestive System

Internal Transport System

Evolution & Systematics

Biogeographic Distribution

Conservation & Threats

References & Links

Digestive System

Turbellarians have a blind gut and the mouth (pharynx) is used for both ingestion of food and excretion of waste. The wall of the gut is single-layered and consists of phagocytic and gland cells.

Larger turbellarians such as Pseudobiceros bedfordi have a highly branched gut (ceca = lateral branches) that extends to the margin of the body (Figure 1). This allows nutrients to diffuse to their tissues. (Ruppert et al., 2004). The gut is lined with cilia and the transport of nutrients occur via ciliary currents. (Barnes et al., 1988).

Digestion is partially extracellular and partially intracellular. Nutrients diffuse into the body and circulates body tissues via cells . There is no circulatory system. The waste products diffuse out of the body via a simplified protonephridial (kidney)system (Figure 1).

Figure 1. Vessel-like ceca of the gut in a polyclad

Polyclads have a highly branched gut ( ceca= lateral branches) that extends to the margins of the body.