The larger the animal, the less surface area per volume that animal has, making cutaneous repiration not very effective.
It also requires that skin be moist, which can bring about a few other problems, such as not being as effective against bacteria and fungi.
Land animals, which includes mammal, have evolved to lessen the amount of water we loose to the environment. Having a large surface area of moist skin can be mal-adaptive.
NO!!! Dolphins have lungs as do all mammals and cannot breathe through their skin. Yhey are obligate lung breathers.
Cutaneous respiration.
Its not impossible. Many animals such as the earthworm and frog do it.
Respiration of animals in the Phylum Vertebrata, Class Amphibia, including classes such as urodela, anurans, & apodans. It involves respiration through the skin.
A frog is an amphibian, but adult frogs do not have gills. They absorb oxygen from the water through their skins, using special blood vessels. If the oxygen level in water is too low, frogs will move around to increase the water flow across the skin. Some frogs have creased skins that can increase their surface area. (see related question)
amphibians use several different methods of respiration depending on their species and age. 1. cutaneous respiration 2. buccopharyngeal respiration 3. pulmonary respiration 4. gill respiration
Mammals use aerobic respiration.
AIR
Mammals are air-breathing vertebrates. In mammals, respiration takes place in the lungs. Parts of the respiratory system include the lungs, diaphragm, bronchioles, bronchi, and trachea.
Unlike mammals who absorb oxygen through the alveolar in their lungs, frogs are able to use their skin as a surface for gas exchange. The capillaries carry oxygen poor blood underneath the skin so that the oxygen in the air or water will be transported into the blood.
Respiration of mammals is aerobic.So O2 is essential for living.
Cutaneous Membrane