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An ectotherm (from the Greek ἐκτός (ektós) "outside" and θερμός (thermós) "heat"), more commonly referred to as a "cold-blooded animal", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]
It is this distinction that often makes the term poikilotherm more useful than the vernacular "cold-blooded", which is sometimes used to refer to ectotherms more generally. Poikilothermic animals include types of vertebrate animals, specifically some fish, amphibians, and reptiles, as well as many invertebrate animals.
Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living traditional reptiles comprise four orders : Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ).
Most reptiles are also cold-blooded, so they’re unable to regulate their own body temperature. Instead, they rely on external heat sources like the sun or the best reptile heating pads to do so ...
Cold-blooded is an informal term for one or more of a group of characteristics that determine an animal's thermophysiology. These include: Ectothermy, controlling body temperature through external processes, such as by basking in the sun; Poikilothermy, the ability of an organism to function over a wide internal temperature range
A cold-stunned iguana that fell from a tree when temperatures dropped in 40s in West Palm Beach, Florida on Dec. 26, 2022. The low temperature immobilize the cold blooded reptiles until it gets ...
Worms, fish, insects, reptiles and amphibians are all cold-blooded. Mammals and birds are warm-blooded. A snake was found in a Woodbridge garage in Bluffton on Monday night.
The precise definition of herpetology is the study of ectothermic (cold-blooded) tetrapods. This definition of "herps" (otherwise called "herptiles" or "herpetofauna") excludes fish ; however, it is not uncommon for herpetological and ichthyological scientific societies to collaborate.