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.
Carbon dioxide (CO2) is a greenhouse gas. It captures  infrared heat rising from the surface of the earth, and this  greenhouse effect keeps the Earth warm. If we have  ext â¦ ra CO2 in the atmosphere, then the  earth becomes warmer.This is happening now, and this global  warming is causing climate change.arbon dioxide raises Earth's temperature because it is a greenhouse gas. The greenhouse effect is basically when gases, like carbon dioxide, trap in heat from the sun that wo â¦ uld usually be released back into space.