Bipalium
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Bipalium is a genus of large predatory land planarians. They are often loosely called "hammerhead worms" or "broadhead planarians" because of the distinctive shape of their head region. Land planarian
Bipalium strubelli
Close up of head of Bipalium kewense
Hammerhead worm seen in Kolkata, India
Hammerhead worm found in Bihar, India
Pharynx
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The pharynx is the part of the throat behind the mouth and nasal cavity, and above the esophagus and trachea. It is found in vertebrates and invertebrates, though its structure can vary across species
Bipalium
…prostomium, peristomium, and anterior end to stop the violent reaction by the earthworm. To feed on their prey, species of Bipalium often evert their pharynges from their mouths, located on the midventral portion of their bodies, and secrete enzymes that begin the digestion of the prey. The liquefied tissues…
Head and inner neck
Pharynx
Details of torus tubarius
Pharyngitis is the painful swelling of the throat. The oropharynx shown here is very inflamed and red.