The problems encountered by diving birds and mammals and the methods used to overcome them

The underwater environment poses multiple conundrums to animals that have evolved to live at the surface which need to be overcome if the animal is to expend the marine setting as a habitat and grazing land environment. These problems are associated with the inability of the terrestrial respiratory surface to distill oxygen from water and thuslyly the resulting hypoxic conditions, and the increasing degree of mob resulting from the overlying column of water, the effects of which become increasingly strong-armer as the nature of the dump becomes longer and deeper, respectively. However, despite these difficulties, many an(prenominal) have reverted to a semi- or fully aquatic lifestyle, employing a variety of anatomical modifications and variations on physiologic properties to avoid these impediments and thus allow for a successful marine existence. One problem associated with honkytonk that has attracted a lot of attention due to the implications it has for compas sionate divers, is decompressing sickness, or the bends. This occurs as a result of the chroma of the trunk fluids and tissues with nitrogen which remains there as the proboscis is futile to metabolise it. This dissolved gas can tho news leak when the nitrogen pressure in the lungs is decreased, unless this can plow hours to effect and as such, bubbles can turn out in the body fluids as a consequence of speedy ascent.

Human scuba divers overcome this problem by following decompression tables formulated by the US navy such that for a work period of 1hr at one hundred ninety feet depth requires a total decompression time of well-nigh 3hours. Diving mammals and birds, however, a re observed to frequently make fast ascents! and dive repeatedly, ostensibly avoiding such affects thus implicating some physiological adaptation not manifest in ourselves. A harsh adaptation appears to be the cockle of the alveoli and lungs prior to a dive such... If you want to get a full essay, order it on our website: OrderEssay.net

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