Woodcut of the mythological seven-headed Hydra killed by Hercules. Illustration from �The historie of serpents� by Edward Topsell published in London...
nematocysts (stinging cells) & diploblastic construction of coelenterates (phylum cnidaria), hydra (cross section), 250x at 35mm. shows: diploblastic construction with epidermis & gastrodermis and mesogloea between them. - hydras ストックフォトと画像
hydra. male with spermaries (testes), 10x at 35mm. hydra is a fresh water coelenterate with radial symmetry. the bumps on the tentacles are nematocysts (stinging cells). - hydras ストックフォトと画像
Engraving by J Chapman of the many-headed monster of Greek mythology. To kill the monster was the second labour of Hercules. He did this by cutting...
Coloured satirical engraving by William Heath , also know by his pseudonym Paul Pry, showing a lady discovering the quality of the Thames water. The...
