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.
Global warming is the unusually rapid increase in Earthâs average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels.lobal warming is the unusually rapid increase in Earthâs average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels.