page_title: Pseudunela cornuta
section_title: Digestive system
hierarchical_section_title: Pseudunela cornuta / Description / Digestive system
caption_attribution_description: English: 3D reconstruction of the right view of digestive system of small marine slug Pseudunela cornuta. mo - mouth otg - oral tube gland apg - anterior pedal gland ot - oral tube r - radula ph - pahrynx sgl and sgr - salivary glands sgd, salivary gland duct oe - oesophagus i - intestine a - anus dg - digestive gland = hepatopancreas. It is a 3D model generated from 420 histological sections by segmentation and surface extraction. - The histological sections have been aligned and stacked together to form a 3D volume, which was then segmented. For each segment mathematical representation of its surface was generated (boundary surface extraction) and then this 3D model was visualized by rendering the surfaces.
context_page_description: Pseudunela cornuta is a species of minute sea slug, an acochlidian, a shell-less marine and temporarily brackish gastropod mollusk in the family Pseudunelidae. Adults are about 3 mm long and live in the spaces between sand grains.
  A complex interactive 3D reconstruction of the body of an individual of this species has been available since 2009.
context_section_description: Digestive system: The mouth opening lies ventrally between the labial tentacles. The paired anterior pedal glands discharge ventral to the mouth opening to the exterior. The oral tube is long and not ciliated. Paired oral tube glands are flanking the oral tube and discharge in its anterior part. The muscular pharynx is bulbous and narrows to the posterior; it contains the hook-shaped radula. The upper ramus is longer than the lower one. The radula formula could not be examined. Jaws are absent. The long, ciliated oesophagus emerges posterodorsally from the pharynx and is flanked by longitudinal muscles. One pair of large salivary glands discharges into the oesophagus via narrow salivary gland ducts directly behind the pharynx.
  The large, sac-like digestive gland is placed at the left side of the visceral hump flanking the ovotestis and extends almost up to the end of the visceral hump. The intestine is densely ciliated and short. The anus opens slightly anterior, but separate to the nephropore and ventrolaterally on the right side of the visceral hump.
caption: 3D reconstruction of the digestive system of Pseudunela cornuta shows for example: mouth (mo), pharynx (ph), salivary glands (sgd, sgr, sgl) and digestive gland (dg, hepatopancreas).
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