Planarian Diagram This Figure Depicts A Classic Planaria Regeneration

Generic planarian illustrating external and internal anatomy. The eyes, mouth, pharynx, gut, brain, ventral nerve cords, and protonephridia are shown. A color version of this figure can be viewed.. Introduction to planarians. (a) A live planarian is pictured with its anterior (head) toward the top of the page. Eyespots are visible. (b) A planarian is diagrammed as pictured in a, with eyespots labeled. The pharynx (feeding organ) is tucked inside the body of the planarian when an animal is not feeding , but the outline of the pharynx can be faintly visible from the dorsal side. During.

A planarian (also known as a triclad; plural planarians or planaria) is a free-living flatworm of the order Tricladida. Planarians occur in marine, freshwater, and terrestrial environments, and the order is divided into the suborders Maricola, Cavernicola, and Continenticola.. Planarian, any of a group of widely distributed, mostly free-living flatworms of the class Turbellaria (phylum Platyhelminthes). The name planarian is used to designate any member of the family Planariidae and related families. Most planarians live in fresh water; some species are marine, while others are terrestrial.