where pain is perceived. When gums recede from aging, teeth can become hypersensitive because the odontoblasts sense cold in a newly exposed region of the tooth. “Most cells and tissues slow their metabolism in the presence of cold, which is why donor organs are put on ice,” says Lenn...
Slow wormswill bite in defence, but their teeth do not protrude far from the gums, and the bite is relatively ineffective. Bites to humans are rare, and virtually painless. Such bites do not generally break the skin, and the reaction is more usually shock, than pain. Do worms feel pain ...
If you look at the picture to the right you will notice that the "business end" of the Hookworm is shaped like a tiny goblet with three sets of teeth. The goblet-shaped mouth is very hard and resists collapse as the worm sucks. The Hookworm grasps onto the inner surface of the small...
Goethe University Frankfurt am Main The RIS neuron (green) in the throat of the threadwormC. elegans. Credit: Wagner Steuer Costa Wagner Steuer Costa in the team of Alexander Gottschalk, Professor for Molecular Cell Biology and Neurobiochemistry, discovered the sleep neuron RIS a few years ago ...