/kəʊldˈblədɪd/ A cold-blooded animal has a body temperature that varies along with the outdoor temperature, and a cold-blooded person is someone who seems to feel no emotions.
Warm blooded animals maintain a relatively constant body temperature regardless of the environmental temperature. This is done through the use of internal heat sources such as muscles and the metabolism of food. Cold blooded animals, on the other hand, rely on their environment to regulate their body temperature.
Animals that cannot generate internal heat are known as poikilotherms (poy-KIL-ah-therms), or cold-blooded animals. Insects, worms, fish, amphibians, and reptiles fall into this category—all creatures except mammals and birds.
When referring to humans, the phrase “cold-blooded” is typically used to describe a person with a cruel or callous personality. But when referring to animals in general, “cold-blooded” refers to the animal's method of regulating their body temperature.
What is important to understand is that body temperatures may vary from person to person depending on their age, activity and the time of the day. While all humans are warm blooded and can regulate their body temperatures, there are some people who may feel colder or hotter than other individuals.
The numerous potential causes for coldness include hypothyroidism, calorie reduction and general aging, where people become more sensitive to cold temps due to a decrease in the metabolic rate and thinning of fat under the skin.
Some people naturally tend to feel colder than others without any discernible cause. However, cold intolerance can also indicate an underlying medical condition, such as hypothyroidism, anemia, or peripheral artery disease.
1. adjective. Someone who is cold-blooded does not show any pity or emotion. [disapproval]
Go for a walk or a jog. If it's too cold outside, hit the gym, or just do some jumping jacks, pushups, or other exercises indoors. Not only will it warm you up, it helps build and keep your muscles, which also burn calories and make body heat.
Sweating more or feeling hotter than usual can be due to medication, hormonal changes, stress, or an underlying health condition, such as diabetes or an overactive thyroid.
Even when bodies are the same size, the amount of body fat inside can vary — and affect how cold or hot we feel in comparison to others. The greater the amount of body fat, the warmer one feels. Older people often might feel colder than younger people, as the fat layer under the skin that conserves heat thins with age.
Although most endotherms appear “warm-blooded” and most ectotherms appear “cold-blooded,” some animals display characteristics of both groups. They are called heterotherms.
synonyms for cold-blooded
On this page you'll find 65 synonyms, antonyms, and words related to cold-blooded, such as: barbarous, brutal, callous, hardened, inhuman, and merciless.
What Makes You Feel Colder When Your Body Is Hotter? It's actually a normal physiological response. As soon as your brain shifts its internal thermostat to a higher set point to fight off an infection, the rest of your body goes to work trying to generate extra heat to meet that higher temperature goal.
These terms just don't really work. The term “cold-blooded” implies that these animals are in a never-ending struggle to stay warm. That really isn't correct. Many species do like it hot, with some monitor lizards basking at temperatures of 120–150 F.
Cold-blooded animals have a disadvantage compared to warm-blooded animals: There is a certain temperature below which their metabolism just won't work. The reason is that all chemical reactions slow down as the temperature is lowered, so at low temperatures, all the chemical reactions in an organism slow down.
Hypothyroidism
“This is one of the most common reasons people always feel cold,” Abokede said. “The thyroid drives metabolism. With a low-functioning thyroid gland, metabolism is slowed and the body can't generate an adequate amount of heat to maintain core body temperature.”
Compared to men, women have less muscle, which is a natural heat producer. They also have 6 to 11 percent more body fat than men, which keeps the inner organs toasty, but blocks the flow of blood carrying heat to the skin and extremities.
showing strong feelings very easily and quickly, especially anger or love. SMART Vocabulary: related words and phrases. Strong feelings.
One cause for this can be hormones. The female hormone estrogen regulates flow of blood to peripheral areas like the skin and extremities. When estrogen levels rise and fall — as they do during menstruation — women become more sensitive to external temperature.
Lastly, studies have suggested that obese patients tend to have a lower core body temperature than leaner individuals, which points to significant metabolic changes as body fat levels increase. In short, don't assume that just because someone is overweight that they feel less cold than their slimmer counterparts.
Self-absorbed; insulated, passively withdrawn. Emotionally unavailable, inaccessible, unresponsive, indifferent, uninvested. Unfeeling, unemotional, affectionless; unsmiling—straight-faced (or stone-faced) Cold-hearted, as in "cold fish" or (even worse) an "iceberg" or "ice queen"