warm-blooded
Definition
Warm-blooded animals are also called endotherms. They generate heat internally through metabolic processes, such as the burning of food. Cold-blooded animals, on the other hand, are called ectotherms. They rely on external sources of heat, such as the sun, to warm their bodies.
The ability to maintain a constant body temperature is an important adaptation for warm-blooded animals. It allows them to stay active even in cold environments. It also helps them to maintain their metabolism and to avoid overheating.
Warm-blooded animals have a number of advantages over cold-blooded animals. They can be more active and can survive in a wider range of climates. They are also less susceptible to diseases and parasites.
However, warm-blooded animals also have some disadvantages. They need to eat more food than cold-blooded animals to maintain their body temperature. They also need to drink more water to prevent dehydration.
How can the word be used?
Birds and mammals are warm-blooded.
Different forms of the word
Adjective: having a relatively high and constant body temperature that is maintained by internal heat production, independent of the external environment.
Etymology
The word "warm-blooded" comes from the combination of the words "warm" and "blooded".
The word "warm" comes from the Old English word "wearm", which means "to heat".
The word "blooded" comes from the Old English word "blōd", which means "blood".
The first recorded use of the word "warm-blooded" was in the 17th century.
Question
What is the difference between hot and cold-blooded animals?
AQA Science Exam Question and Answer
Question:
Explain the concept of warm-bloodedness in animals and how it differs from cold-bloodedness. Discuss the advantages and challenges associated with being warm-blooded, focusing on energy requirements and environmental adaptability.
Answer:
Warm-bloodedness, also known as endothermy, refers to the ability of certain animals to regulate their body temperature internally, independent of the surrounding environment. This contrasts with cold-blooded animals, or ectotherms, whose body temperature is largely influenced by external conditions.
Warm-blooded animals maintain a relatively stable body temperature, often higher than their environment. This allows them to be active in a wide range of habitats and climates, as they are less reliant on external heat sources for warmth. Warm-bloodedness provides advantages such as enhanced metabolic activity, rapid responses to stimuli, and improved muscle function.
However, being warm-blooded comes with higher energy requirements. Warm-blooded animals need to consume more food to sustain their elevated metabolic rates. This makes them more efficient predators, but it also means they need to locate and consume food more frequently.
Cold-blooded animals, on the other hand, have lower energy demands but are often limited by temperature fluctuations, as their activity levels are closely tied to external conditions.