Deoxygenated blood is carried by pulmonary artery from heart to lungs
Oxygenated blood is carried by pulmonary vein from lungs to heart
Chemotaxis is movement of a motile cell or organism, or part of one, in a direction corresponding to a gradient of increasing or decreasing concentration of a particular substance.
Short term effects include memory loss, hangovers, and blackouts. Long term problems associated with heavy drinking include stomach ailments, heart problems, cancer, brain damage, serious memory loss and liver cirrhosis.
Organisms that live in stable environments tend to make few, "<span>expensive" offspring are K Strategist</span>
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I believe that climate change is one of the most serious problems of young generations. At the current pace of greenhouse gas production global warming will increase exponentially, which will result in rising sea levels, certain animal species going extinct. Deforestation also severely adds to this problem as wood is a finite resource on Earth and the more trees we destroy the less oxygen there is relative to the amount of carbon dioxide in the atmosphere. This will continue to weaken the ozone layer which could result in catastrophe from sun flares or radiation. I do believe that in the near future drastic measures will be taken to prevent these events.
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