The process by which an animal can breathe without lungs ie. through moist skin. Oxygen can pass through the skin into the blood capillaries close to the skin surface. Examples are amphibians, specifically the 'lungless salamanders'.
cutaneous gas exchange
The skin of a frog is suitable as a minor respiratory organ because it is thin and moist, allowing for oxygen and carbon dioxide exchange to occur directly through the skin. The capillaries near the skin surface help facilitate gas exchange, making it an efficient way for frogs to breathe, particularly when they are underwater or in environments with low oxygen levels.
Manometers are typically used to measure pressure, so they are not commonly used to directly measure metabolic gas exchange. For recording metabolic gas exchange, methods such as gas analyzers or respiratory gas exchange systems are more commonly used because they can measure specific gas concentrations in exhaled breath.
Water is lost from the gas exchange surface of terrestrial organisms because gases must be exchanged with air. Terrestrial organisms have a high water potential, therefore when the gas exchange occurs water will be lost.
An animal's type of gas exchange system is influenced by its environment. Animals in aquatic environments may have gills for efficient gas exchange with water, while terrestrial animals often have lungs to extract oxygen from air. Some animals like insects have a tracheal system for gas exchange that connects to almost every cell in their body. The type of gas exchange system an animal has is adapted to meet the specific oxygen requirements and environmental conditions of its habitat.
cutaneous gas exchange
cutaneous gas exchange
cutaneous gas exchange
Cutaneous gas exchange.
cutaneous
Toads breathe through their skin with whats called cutaneous gas exchange. They also have lungs for when they're out and about, but when in hibernation or submerged in water, they just use their skin.
Gas exchange is a function of respiration not digestion.
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.
Most frogs and toads breathe (and take in moisture) through their skin through a process called cutaneous gas exchange, but they also have lungs with which they breathe.
Thermoreceptors
The skin of a frog is suitable as a minor respiratory organ because it is thin and moist, allowing for oxygen and carbon dioxide exchange to occur directly through the skin. The capillaries near the skin surface help facilitate gas exchange, making it an efficient way for frogs to breathe, particularly when they are underwater or in environments with low oxygen levels.
Alveoli is where gas exchange occurs.