 Well, this is the next topic which is the concept of thermo regulation. As we have seen in the previous module or slide that homeostasis is an important variable which is the thermo regulation and the temperature key regulation. So thermo regulation is the ability of an organism to keep its body temperature within certain limits, like in humans as well, that is 37, that is the moderate temperature and in birds like this, it is up to 41, that is the moderate temperature for those animals. So its maintenance, this is what is called as thermo regulation and it also has limits. Even when the surrounding temperature is very different, like there are many organisms who live in extreme low conditions but their body temperature is not the one that is outside. Otherwise, if the surrounding temperature is too high, then its temperature will also be the same. But that is kept within limits. So this is what is called as thermo regulation. Now a thermoconformer, some animals are thermoconformers, that means that if the temperature is too high, then the animal's temperature will also be the same. But it is not very extreme, that is why these thermoconformers live in tropical regions where the range of temperature is not very extreme, that is the moderate temperature. And there are many other countries that live in these regions where the temperature is neither extremely cold, nor is it high, that is the high temperature, the environmental temperature. So a thermoconforming organism by contrast simply adopts the surrounding temperature. And the surrounding temperature will be the same as its own body temperature. Thus avoiding the need for internal thermo regulation. So a thermoconformer does not have to be so extreme to regulate the temperature. Why? Because this outside temperature is not in extreme conditions, especially in the tropical region. Now the temperature of a living cell that affects the rate of its metabolic process. So the role of the temperature in the metabolic process is very important. Any chemical reaction, if we slow down the chemical reaction, then the temperature will decrease. If we fast down the temperature, then the temperature will increase. But this is not beyond limits, it also has limits. Now an animal can grow faster and respond to the environment more rapidly as its cells are kept warm. If a living body is kept at a very low temperature, let's say zero or minus zero, then the activity of cells is usually slowed down. And if we are at a moderate temperature, the reason for this is the enzymes. So every enzyme has its own temperature and activity at certain optimum temperatures. So these are the organisms in the world that are conformists. So the temperature of a living cell affects, but the temperature affects the root to increase or decrease the metabolism of the cell or metabolic process. Now an animal can grow faster and respond to the environment more rapidly if the cells are kept warm. Because the warmth of the cells or the warmth of the animals or the moderate temperature is very suitable for the growth of an organism. It is like a plant, for example. So when a lot of people get a low temperature, their growth stops. Or a very high temperature, 50 degrees centigrade, then the activity of the plants slows down and their growth decreases. So when they come at a moderate temperature, then plants like these days, like in Monson, there is a lot of sunlight, the temperature is not that high and humidity is also good. That is why plants grow very fast in such a environment and the same is true with certain animals. Now this ability to control the temperature of the body is called thermo-regulation, as we also call heat control. It involves the nervous system, respiratory system and circulatory system. It is the role of the body to maintain the body temperature. When the body temperature increases, the panting starts so that the heat is generated and dissipated. So this is a nervous system or endocrine system which is very important to maintain this thermo-regulation or overall homeostasis. And this is the same thing that affects evolution. And as a lot of scientists believe, that the ability of some higher animals to maintain moderate body temperature is a major reason for their evolutionary success. So this is a very important role for evolutionary success. If the temperature had been very low from the start, then it is possible that this evolution would not have happened with that rapid process. So this is the concept of the thermo-regulation. So this is all about.