Circulatory systems in animals, Biology

Assignment Help:

Circulatory Systems in Animals

In animals that have efficient circulatory systems and readily permeable vascular skins, gas exchange occurs through the integument. Thus we find that animals like earthworms, leeches and many larval fishes are among the many animals that obtain the oxygen they need across their general body surface. Even larger animals such as many amphibians and fish may rely on cutaneous respiration during emergencies or use it as a supplement to the gills or lungs. The ability to respire through the integument developed the most in eels, and amphibians that have moist and highly vascularised skins.

The integumentary contribution to respiration may be as low as 20 per cent in dry-skinned toads to 76 per cent in the urodele Triturus alpestris and over 90 per cent in the giant salamander Cryptobranchus alleganiensis. This aquatic amphibian is the largest animal relying exclusively on integumentary breathing. The adults are 25 to 60 cm in length and may weigh over 1 kg. These animals lack gills and the lungs being unspecialised play little or no part in respiration. Animals that are large and have higher metabolic rates have specialised respiratory organs. These organs have a thin respiratory surface to help in gas exchange.


Related Discussions:- Circulatory systems in animals

Cardiac care on admission for operation, Cardiac Care on Admission (First t...

Cardiac Care on Admission (First two hours) ECG is monitored by more than one lead (three to five). Left atrial pressure, arterial BP, central venous pressure, respiration

Excreation, what is the role of liver for the metabolism of carbohydrates

what is the role of liver for the metabolism of carbohydrates

Significance of apomixis, Significance of Apomixis Apomixis offers th...

Significance of Apomixis Apomixis offers the possibility of indefinite multiplication of especially favorable biotypes without any variation due to segregation or recombinati

Dehydration reaction between both molecules, Draw decanol, plamitic acid (C...

Draw decanol, plamitic acid (C16:0 fatty acid) and the resulting wax ester generated by a dehydration reaction between both molecules

What is oligosaccharides , Oligosaccharides are short chains of m...

Oligosaccharides are short chains of monosaccharides linked together by glycosidic bonds. In case of oligosaccharides  linked to proteins (glycoproteins)  or lipids (glycolipids) o

What is the association between inflammation and fever, What is the associa...

What is the association between inflammation and fever? In the tissue region where inflammation happens bacterial toxins, cytokines, prostaglandins, interleukins and endothelin

What are the transposable elements, Transposable elements are able to move ...

Transposable elements are able to move around the genome by precise or imprecise excision events. What is meant by imprecise excision? A. Imprecise excision refers to a transpo

Female reproductive disorders-retained foetal membranes, Retained foetal me...

Retained foetal membranes The foetal membranes are normally expelled within 6to 12 hr after parturition in cows and buffaloes. If the foetal membranes are not voided even upto

Organic chemistry and macromolecules, identify 7 speccific ways in which yo...

identify 7 speccific ways in which you can diversify carbon-containing compounds

Describe phases in the care process, There are 5  distinct yet constantly i...

There are 5  distinct yet constantly interacting phases in the care process. Assessment : A broad base of relative information about the patient's nutritional status,  food ha

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd