Humans, polar bears, penguins, and prairie dogs, like most other birds and mammals, are endotherms. Iguanas and rattlesnakes, like most other reptiles—along with most fish, amphibians, and invertebrates—are alternating heat. Endotherms generate most of the heat they need internally.
Endotherms, so-called warm-blooded animals; that is, those that maintain a constant body temperature regardless of the environment. The endotherms mainly include the birds and mammals; However, some fish are also endothermic.
Ectotherm, any so-called cold-blooded animal—that is, any animal whose regulation of body temperature depends on external sources such as sunlight or a heated rock surface. The alternating heat includes the fish, amphibians, reptiles and invertebrates.
Melting ice cubes. Melt solid salts. Evaporating liquid water. The transformation of frost into water vapor (melting, boiling, and evaporating are generally endothermic processes.
But humans, dogs, and thousands of other mammals are endotherms, while reptiles, fish, lizards, and invertebrates are ectotherms.
Of the shark species studied in the study, four shark species are endothermic – salmon, porbeagle, albacore and shortfin mako – and five tuna species – yellowfin tuna, southern bluefin tuna, Atlantic bluefin tuna, Pacific bluefin tuna and albacore tuna.
The biggest difference lies in their biology. Reptiles and amphibians are ectotherms while birds are endotherms. An ectotherm (reptile/amphibian) relies primarily on its external environment to regulate the temperature of its body.
It’s an endotherm. Endotherms are better known as warm-blooded animals. Endotherms don’t rely on the environment to control their internal body temperature; you can control it yourself. All birds and mammals are endothermic.
Only birds and mammals are universally endothermic animal groups. Certain Argentine black-and-white tegu, lamnid sharks, tuna, and swordfish are also endothermic. Endotherms are popularly referred to as “warm-blooded animals”.
Rather, ectotherms rely on external or “outside” sources to regulate their body heat. Examples of alternating heat include reptiles, amphibians, crabs and fish.
Insects are exothermic (cold-blooded), meaning they cannot produce their own body heat.
It is endothermic (most of the thermal energy is used to maintain its high body temperature). It has a 4-chamber heart. They also have mammary glands which are used to produce milk to feed their young.
Snakes are reptiles and all reptiles are cold-blooded (ekto = from outside, thermal = temperature). That is, they draw body heat from their surroundings. Mammals, like humans, are endothermic (endo = from within, thermal = temperature) or warm-blooded. We control our body temperature internally.
Endotherms and Ectotherms
Humans, polar bears, penguins, and prairie dogs, like most other birds and mammals, are endotherms. Iguanas and rattlesnakes, like most other reptiles—along with most fish, amphibians, and invertebrates—are alternating heat.
If the cheetah’s body temperature remains relatively constant, this would provide more evidence that the cheetah is an endotherm.
1 Ectothermic and endothermic metabolism. Humans are endothermic organisms. This means that humans are less dependent on the external ambient temperature than cold-blooded (blood-blooded) animals such as fish and reptiles [6,7].
Frogs are cold-blooded amphibians that cannot regulate their temperature internally like birds or mammals. Instead, they have to warm up with other things outside of their body – this action is called thermoregulation. Ectotherms use behavioral mechanisms to control their body temperature.
The iconic red kangaroo is an example of an Australian endotherm that employs multiple temperature control strategies, including altering their metabolic rate.
Whales, dolphins, seals and other marine mammals can generate their own heat and maintain a stable body temperature despite changing environmental conditions. Like humans, they are endothermic homeotherms – or colloquially “warm-blooded.”
Most mammal and bird species are warm-blooded animals. The whale is a mammal and pigeons and bats are birds. So they are endothermic animals. Therefore, option B is the correct answer.