Brain tissue that has suffered a sudden blackout of blood supply due to a stroke will have to resume its functions by revascularizing.
Functions such as attention, language, thinking, or even remembering may be difficult or slow down a lot. This is called vascular dementia, usually caused by a stroke, but sometimes also caused by heart disease, high blood pressure, or even smoking.
Poisonous plants, but not bad ones
To defend themselves against pests, several plant species have
learned in the course of evolution to produce defensive substances of various kinds,
which can also create more or less serious
