Heat exchangers, Biology

Heat Exchangers

Seals and whales have flippers and flukes that lack blubber and are poorly insulated. These appendages are well supplied with blood vessels an; receive rich blood supply. Therefore, these than structures with their large surface areas can lose substantial amounts of heat and aid in heat dissipation.

1064_Heat Exchangers.png

 

Figure:  Countercurrent system for conserving heat in the flippers

However, excessive loss of heat is prevented due to the counter- , current heat exchangers in which the blood flows in opposite direction. In the whale flipper, each artery is completely surrounded by veins, and as warm arterial blood flows into the flipper it is cooled by the cold venous blood that surrounds it on all sides. The arterial blood therefore, reaches the periphery precooled and hence loses little heat to the water. The heat has been transferred to the venous blood, which thus is prewarmed before it reenters the body.

Posted Date: 1/16/2013 6:01:40 AM | Location : United States







Related Discussions:- Heat exchangers, Assignment Help, Ask Question on Heat exchangers, Get Answer, Expert's Help, Heat exchangers Discussions

Write discussion on Heat exchangers
Your posts are moderated
Related Questions
Eastern/Western/Venezuelan equine encephalitis This encephalitis causing group of viral diseases of wild birds including pheasants, chickens, turkeys, ducks and pigeons with a

Define symptoms in Stomach and Mouth of pernicious anaemia? Stomach: The cells which secrete acid and enzymes are atrophied. The gastric secretions are devoid of acid, pepsin

In 1906, Greenfield described the fabrication and insertion of an endossoeus implant. He for the first time, used a basket shaped, round, hollow implant made of an iridium-platinu

55yrs old woman had burns and has lost 6% body fluid.She weighs 50Kg.How much fluid does she need to replace the lost fluid.

Q. Show the principle parts of a mold? The principle parts of a mold are a web-like structure known as mycelium and the spore. The mycelium is often white and cottony and penet

Results: The risk of isolated aortic valve replacement is 3-4 per cent. The long term survival for 5, 10 and 15years is 75 per cent, 60 per cent and 40 per cent respectively. The

Q. What is the cell division process directly related to the embryonic growth? The embryonic growth depends directly on mitosis Through this kind of cell division the zygote di

EGG S OF INSECT This eggs is centrolecithal and it is elliptical. It diameter is 2-3 mm. It has two eggs membrane i.e. vitelline membrane and chitinous capsule. The chit

Define Procedure for Detection of Number of Bacteria in Milk? 1. Place a clean, non-greasy slide over the graph paper. 2. Spread 0.01 ml of the milk over an area of 1 cm2 as

State  in brief about the Macronutrients  Each element is specific in its function in plant metabolism, however, the exact functions for a number of them are still not known. T