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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]
Habitat destruction is the leading negative impact of humans on reptiles. Humans continue to develop land that is important habitat for the lepidosaurs. The clear-cutting of land has also led to habitat reduction. Some snakes and lizards migrate toward human dwellings because there is an abundance of rodent and insect prey.
Most lizard species are harmless to humans. Only the largest lizard species, the Komodo dragon, which reaches 3.3 m (11 ft) in length and weighs up to 166 kg (366 lb), has been known to stalk, attack, and, on occasion, kill humans. An eight-year-old Indonesian boy died from blood loss after an attack in 2007.
Anoles can function as a biological pest control by eating insects that may harm humans or plants, [19] but represent a serious risk to small native animals and ecosystems if introduced to regions outside their home range. [20] [21]
Researchers are increasingly aware that the bacteria in an animal’s gut play a huge role in everything from digestion to immunity.
Their "harpoon" is venomous, which assists cone snail to paralyze or kill the prey before eating it. A number of vertebrate species also make use of solid projectiles. Among birds the hornbill uses projectile motion to eat food. The hornbill's beak typically only contacts at the tip, and it has a short tongue.
The sea creatures are one of the most poisonous fish. They also really hate it when people step on them. When that happens, the fish immediately release venom into whatever disturbed it.
Hearing in humans relies on 3 parts of the ear; the outer ear that directs sound waves into the ear canal, the middle ear that transmits incoming sound waves to the inner ear, and the inner ear that helps in hearing and keeping their balance. Unlike humans and other mammals, snakes do not possess an outer ear, a middle ear, and a tympanum but ...