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
Steroid and Thyroid Hormones Cytoplasmic receptors for steroids are proteins with two subunits that bind to the steroid molecules. When both receptor sites are occupied by the

Reproductive Organs In several metazoans, gonads are well-defined. Testes and ovaries take up dissimilar shapes and anatomical dispositions. In cases of certain hermaphrodites

One way that the cortex has been parcellated is based on fine-grained anatomical differences in the composition of the cortical layers: their thickness and types of neurons that ar

Explain the working of Conical Flasks? Conical flasks of different volumes can be used for media preparation and also for culturing large amount of microorganisms in liquid med

Anticodon is the series of three nucleotides on the transfer RNA molecule which recognizes and pairs with the specific codon on a messenger RNA molecule; it helps in controlling t

Planning the Nursing Care   1) Maintain hydration and electrolyte balance.  2) Administer accurate and adequate antibiotics drugs.  3) Prevent the spread of infection.

Diesel-like liquid obtained from materials of biological origin is called biodiesel. Biodiesel can be obtained (i) either from lipids accumulated plants and algae or (ii) from

Determine the Uni-ocular movements Uni-ocular movements are the movements of  one eye  studied  at  a time. That means, when left  eye is  covered, then movements  of  uncovere

Predisposing factors The incidence of metabolic diseases in cows and buffaloes increases as the milk production increases and the herd size becomes larger. The highest inciden

Q. Which animals make tracheal respiration? Is there a blood-like fluid that participates in this process? Arachnids and Insects are the arthropod animals that make tracheal re