Fenestra In histology, fenestrÃ¦ are small pores in endothelial cells that allow for rapid exchange of molecules between sinusoid blood vessels and surrounding tissue. These pores may enlarge and contract at the action of various stimuli such as noradrenaline.FenestrÃ¦ is a Latin word that means window.
Global Warming. An issue of major concern is the possible effect of the burning of fossil fuels and other contributers to the increase of carbon dioxide in the atmosphere. The action of carbon dioxide and other greenhouse gases in trapping infrared radiation is called the greenhouse effect. It may measurably increase the overall average temperature of the Earth, which could have disastrous consequences.
Definitions Global warming: the increase in Earthâs average surface temperature due to rising levels of greenhouse gases. Climate change: a long-term change in the Earthâs climate, or of a region on Earth.hether referred to as global warming or climate change, the consequences of the widescale changes currently being observed in Earth's climate system could be considerable.