 concept of zoology, first the contents defining zoology, the essence are base of zoology, brief history of zoology and what we study in zoology. So, students let me talk first about the zoology. Zoology is one of the very interesting subject of the life sciences or overall the basic sciences. In the basic sciences, the most interesting or fascinating subject to study or understand is zoology because it deals with the real life. The real things that exist, what do they do? They deal with it. So, zoology basically is a Greek word, zone means animals and logos means study. So, zoology is actually the branch of biology which deals with the study of animals. So, the reference of animals that we study, that is actually we are studying the zoology. So, what is the base of zoology? What is the essence of zoology? Zoology, if we look at it simply, zoology's curiosity is due to the fascinating life of animals. The more life you see on the earth, the more fascinating you will get by the animals. In life, you have bacteria, algae, plants. But the most beautiful, most diverse, they are actually the animals. So, if you look at the animals simply, there is a layman too. A common man has domestic animals, while some people are very interested in wild animals. In nature, how many animals are there? Or some people keep animals as pets. Animals are actually very attractive nature, creation of nature. So, similarly, the beautiful aquatic life. You can see the aquatic organism, especially the fishes, marine fishes. If you look at marine life or fresh water fishes, they are very beautiful. So, due to the very beautiful nature, we are very charming animals. So, what in our mind, when we see the animals, when they are moving, when they are living in their habitat, the first question in our mind is how the animals live and where do they live? Where do they live? How do they live? Then what do they eat? What do they do? And how their life is being continued. So, when we look at animals, ultimately, whether they are scientists or laymen, when we look at something, there is a curiosity in our mind about how it would be. Similarly, when we look at the animals, we find that they are animals. So, where do they live? What do they eat? How do they protect themselves? And what is their interaction with the animals in the environment? What is their benefit? What is their danger? So, what is related to animals is the base of zoology. When we are studying anything about the animals, that is actually we are studying the zoology. So, history of zoology. History of zoology is the same thing as when a human would have contacted any animal. We can say the history of zoology is as old as the human history. As long as the history of human history is the same, zoology is old knowledge. Definitely, when a human would have killed an animal, made a pet or interacted with an animal, that would be the start of the zoology. That is where the zoology starts. So, the documented history of humans starts with Romans and Greeks. So, if we look at the books of Romans and Greeks, we can see the classification of animals. There are a lot of volumes of animals that are available in ancient history, in Greek history and Roman history. We will show the studies of the animals, which are showing that zoology was present at that time even. When science was in its early days, the zoology knowledge was present and was being revealed. In Greek history, there are Muslim scientists. Muslim scientists have written a lot of books about animals and humans. You must have read the book of Abraham Hessem in a book about the structure of the mother. There are some scientists who have written about the exclutory system. Some Muslim scientists have written about ants, horses, camels. This means that during the time of Muslims, the zoology was gradually being developed. But if we talk about the revolution, the knowledge of zoology has been revolutionised with modern age. In modern age, since science has developed a lot of instruments, experiments have started to be performed in a better way, the knowledge of zoology has been blown out in this scenario. It has expanded a lot. If we look at the knowledge of zoology, the maximum knowledge we get is the latest knowledge, which has been developed in the latest era or modern studies. So, what we are studying in zoology? What we are studying in zoology? We are studying about any animal that we can think about, that is what we are doing about zoology. For example, we have to keep an animal in a special place, in a natural environment. That is the zoology. Nowadays, most of the animals that we have are made by wild life. They are made by national parks. National parks, zoos, safari parks. This is all zoology. What are you doing in a specific habitat? You are providing the environment for the animals. You are preventing people from killing them. So, all the care you are doing about the animals, this is all zoology. So, we observe different activities of animals. We observe different activities of animals. What is the feed of animals? What do animals eat? How do they live? How do they reproduce? How do they grow? How do they nourish young ones? So, this is all about the zoology. What is the structure and function? This is the part in which the most focus is on the zoology. What is the structure of the animals? How do they perform their function? This is the structure. Animals like us, being human. Humans are also animals. As animals, we are also a part of the zoology. So, what are the body parts of the animals? What are the heads? What are the eyes? What are the hearts? What are the lungs? What are the legs? How are they functioning? How are the hearts working? How are the muscles of the heart? Even, the zoology knowledge is so deep, that it discusses on the cellular and molecular level. For example, which genes are present in the nucleus of a cell? What are the proteins being formed? So, this is all about zoology. Now, zoology is more focused on the micro level than a broad scenario. On the cell level, on the gene level. But what we are studying about the animals? Whatever we are studying about the animals, are all about zoology. Whether we study it by calling it molecular biology, or by calling it biotechnology, or whether we study it by calling it physiology, or by calling it any other reference. Whatever you are studying about the animals, that is all the zoology. Thank you.