Earthworm, longitudinal section
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Earthworm, longitudinal section
Earthworm. Light micrograph of a longitudinal section through the body of a round segmented earthworm (Lumbricus terrestris), showing the first 14 anterior segments. From right: the mouth (1-2), buccal cavity (3-4), thick pharynx (5-7), oesophagus (pink rings, 8-14). Segments 8-14 show the pseudohearts (dorsal pink rings). Segments 10-14 show the seminal vesicles producing sperm (solid purple circular areas). Segments 12 and 14 show the anterior and posterior seminal funnels (deep purple tubes), and the spermatheca (solid dark purple circle). Magnification: x14 when printed at 10 centimetres across
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6470549
© DR KEITH WHEELER/SCIENCE PHOTO LIBRARY
Annelid Worm Annelida Buccal Cavity Digestion Digestive Earth Worm Histological Histology Longitudinal Lumbricus Terrestris Mouth Oesophagus Re Production Reproductive Segment System Systems Worm Light Micrograph Light Microscope Section Sectioned Seminal Vesicles
EDITORS COMMENTS
This print showcases the intricate anatomy of an earthworm through a longitudinal section. The round segmented body of the Lumbricus terrestris is beautifully captured, revealing its first 14 anterior segments in stunning detail. Starting from the right, we can observe the mouth and buccal cavity followed by a thick pharynx that spans segments 5 to 7. The oesophagus is depicted with pink rings across segments 8 to 14. Segments 8 to 14 also exhibit dorsal pink rings known as pseudohearts, which play a crucial role in the worm's circulatory system. Moving further down, we encounter seminal vesicles producing sperm represented by solid purple circular areas within segments 10 to 14. Notably, segments 12 and 14 display deep purple tubes called anterior and posterior seminal funnels respectively, along with a solid dark purple circle representing the spermatheca. With a magnification of x14 when printed at just ten centimeters across, this image offers an extraordinary glimpse into the reproductive and digestive systems of these fascinating creatures. It serves as a testament to nature's complexity while providing valuable insights for zoologists and biologists studying invertebrates like annelid worms. This remarkable photograph captures both scientific precision and artistic beauty simultaneously - truly exemplifying Science Photo Library's commitment to showcasing awe-inspiring images from our natural world.
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