NEET UG » NEET UG Study Material » Biology » Cold Blooded and Warm Blooded Animals

Cold Blooded and Warm Blooded Animals

The ecosystem contains both warm-blooded and cold-blooded species. Both have mechanisms and metabolisms in place to keep and control their respective temperatures.

Cold-blooded animals are those that are unable to regulate the temperature of their internal body in response to changes in the environment. They are unable to survive at severe temperatures. Reptiles, fish, and other cold-blooded animals are examples. Warm – blooded animals are those that have the ability to control and maintain their internal body temperature. They can quickly adjust to any temperature range, allowing them to survive in any environment. Warm-blooded animals are best represented by mammals.

Cold Blooded Animals

Ectotherms, or cold-blooded creatures, are organisms that control their temperature in response to variations in the surrounding temperature. Since their metabolic rate is directly proportional to body temperature, the surrounding temperature has a significant impact on these creatures’ activity. In general, activity declines when the surrounding temperature falls, and vice versa. Heat or energy gained from the environment regulates metabolic rate more than energy created within the body. As a result, the majority of cold-blooded creatures live in warm environments. Animals that thrive in cold environments are often slow. Cold-blooded animals use a variety of adaptations to raise their body temperature, including sunbathing, altering body colours, extending out limbs in the sun, and so on. Cold-blooded animals remain dormant during the winter months. Certain frog species and salamanders, for example, do not move during the winter, and most insects do not fly until the temperature of their flight muscles reaches a comfortable level. Many animals, particularly vertebrates like frogs, reptiles, and fish, are cold blooded.

Examples of Cold-Blooded animals

Crocodiles

Crocodiles are reptiles with cold blood and a fluctuating body temperature.

Crocodiles like a body temperature of 30-33°C and migrate between cold and warm areas of land and water to attain this temperature.

The majority of these creatures’ bodies are normally oriented toward the sun. However, when the body warms up, they turn their small heads toward the light to limit heat absorption.

They also open their mouths to evaporatively cool their brains.

As a result, they use their temperature environments to achieve thermoregulation behaviour.

Most reptiles’ skin contains specialised peripheral nerve endings that may respond to a variety of environmental conditions.

Fishes

Fish are cold-blooded creatures that have a fluctuating body temperature as they migrate through diverse environments with varying temperatures.

At various heights, the water resources have varying temperatures. As a result, as fish migrate from one depth to another, their body temperature changes.

Fish metabolism, fluid-electrolyte balance, and acid-base relationship may all be affected by an abrupt change in the environment. They use behavioural and physiological thermoregulation processes to maintain their temperature.

Fishes move about a lot to find water that is the right temperature for them in order to achieve behavioural thermoregulation.

Tunas and lamnid sharks, for example, have particular anatomical adaptations for counter-current heat exchange in the lateral swimming muscles.

Although a fish’s thermoregulatory centres can’t help in maintaining a steady internal body temperature, they can help determine physiological changes that come with temperature change.

Antifreeze is produced by fish in the polar zone, which lowers the freezing point of their bodily fluid and thereby protects them from the cold.

Warm Blooded Animals

Warm-blooded creatures are called endotherms because they can regulate their own body temperature despite changes in the external temperature. Sweating, panting, insulation, modulation of blood supply to extremities, migration, hibernation, burrowing, modifying the body surface area to body volume ratio, and other metabolic and adaptive systems help them maintain a steady body temperature between 35 and 40 °C. Warm-blooded creatures can adapt to a broad variety of environmental temperatures, from the icy arctic to the hottest deserts, owing to these systems. As a result, warm-blooded creatures may be found in practically every ecosystem on the planet. Warm-blooded creatures are limited to mammals and birds. Warm-blooded animals have a far higher energy expenditure than cold-blooded animals due to their high metabolic rates.

Examples of Warm-Blooded animals

Mammals

Mammals are warm-blooded creatures, with a body temperature that remains constant regardless of the surrounding temperature.These creatures’ bodies are covered with hair or fur, which helps to maintain a steady temperature.

Several physiological and behavioural adaptations, in addition to these structural characteristics, help in maintaining internal temperature.Different mammal species exploit different ecological locations across the world because they have different adaptation mechanisms.

Thermoregulation in animals is accomplished by a variety of processes. Some mammals produce heat, while others keep the heat they alreadyTemperature regulation in mammals also serves as a defence system against diseases and pathogen attacks.

Birds

Birds are warm-blooded creatures with a steady body temperature that does not fluctuate with the external temperature.

To keep a consistent temperature, birds engage in a variety of metabolic processes that result in heat production or loss.The feathers on the birds’ bodies protect them from excessive cold or heat.

Many birds, such as ducks, cover unfeathered body portions such as limbs behind their feathers to avoid heat loss. Some birds may migrate into the water to cool down through evaporating cooling.

Birds’ capacity to survive severe temperatures while keeping a consistent internal temperature contributes to their ecological niche variety.

DIFFERENCE BETWEEN COLD BLOODED AND WARM-BLOODED ANIMALS

BASIS OF COMPARISON

COLD BLOODED

WARM BLOODED

Definition

Cold-blooded animals are those that are incapable of changing their body temperature in response to the environmental temperatures.

Warm-blooded animals are those animals that can maintain a nearly constant body temperature regardless of the temperature in their surroundings.

Body temperature

They don’t have a fixed body temperature since their bodies changes according to the temperature of the environment.

Their body temperature is usually constant, ranging between 35 and 40 degrees Celsius.

Phase

They go through two stages to defend themselves against extreme weather. Hibernation is a resting period that lasts from weeks to months throughout the winter. In the summer, aestivation is a resting period.

The majority of them do not go through such periods since they can adjust to changes in the environment’s temperature. 

Survival

Animals with cold blood cannot live under extreme temperatures or conditions.

Warm-blooded creatures adapt quickly to changes in temperature and environmental factors.

Heat source

They rely on direct sunlight and heat from the environment to survive.

They produce heat from the consumption of foods.

Conclusion

The ecosystem contains both warm-blooded and cold-blooded species. Both have mechanisms and metabolisms in place to keep and control their respective temperatures. Both strive to control their body’s heat in various ways. Warm-blooded people have a complicated bodily system. Cold-blooded animals do not have such complex systems. Cold-blooded animals have a variety of proteins that interact with the external environment on multiple levels. The genomes of cold-blooded animals are extremely complicated. Warm-blooded species’ genomes are simpler. Warm-blooded species, particularly seals and whales, rely heavily on fat for survival. Excess fat in a cold-blooded animal causes their body to overheat, resulting in death.

 
faq

Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

Are all fishes cold blooded?

ANS. NO, All fishes are not cold-blooded. Example- bluefin tuna, the great white shark etc.

Why are cold blooded animals unique?

ANS. Their bodies cannot regulate temperatures internally, so their temperature is not constant and varies according...Read full

What are endotherms?

ANS. Endotherms are those animals that can produce their own body temperature despite the environmental temperature ...Read full

How do warm blooded animals produce heat?

ANS. Warm blooded animals produce heat through consumption of foods.

Give one major difference between warm and cold-blooded animals.

Ans-Cold-blooded animals are those that are incapable of changing their body temperature in response to the environm...Read full