3. Blood Disorders. Blood disorders such as hemophilia and leukemia can cause unexplained bruising, often because your blood fails to clot properly. If you have severe and frequent unexplained bruising, it's a good idea to see a physician to rule out such disorders, especially if it seemed to come on suddenly.
Puffer fish contain the potent neurotoxin tetrodotoxin. TTX is thought to be synthesized by a bacterial or dinoflagellate species associated with the puffer fish. The toxin is concentrated in the liver, gonads, and skin. The level of toxicity is seasonal, and, in Japan, fugu is served only from October through March.
Pet Poison Helpline. Cherry. Cherry trees and shrubs (Prunus sp) including the Choke cherry, Black cherry and cherry laurel contain cyanogenic glycosides. All parts of these plants other than the ripe pulp around the seeds are considered toxic and contain cyanide. Cyanide inhibits cytochrome oxidase, an enzyme necessary for cellular oxygen transport, preventing appropriate oxygen uptake by cells.