Animals are multicellular, eukaryotic organisms that are members of the biological kingdom Animalia. They breathe oxygen and eat organic materials. Most animals are capable of sexual reproduction and can move. Read on to learn about the different types of animals and their differences. Let's start with a little background. What are animals? What do they look like? What is their behavior? And how do you differentiate between birds, mammals, and fish?
Animals have a nervous system, musculoskeletal system, digestive system, endocrine system, and circulatory system. The circulatory system delivers oxygen and nutrients to the cells. The reproductive system helps the animals reproduce. But, it isn't just the nervous system that makes them human-like. It's also important to understand how animal brains work. The development of these systems is necessary for the survival of the species.
Aside from these characteristics, animals can also be classified into two major groups. The first category is plant life, which is made up of different species. Aside from these two categories, there are many other types of animals and plants that exist in nature. Taking a look at these two subgroups will give you a better idea of the various kinds of life in the world. And as you learn more about these two subsets of animals, you'll be able to expand your knowledge of what makes the species different from each other.
In addition to their differences in structure, animals exhibit distinct features. They have specialized sensory organs like eyes, ears, skin, tongue, and nose. These organs allow them to perform specific functions. Their bodies are divided into tissues based on what they do. These tissues include nervous tissues, epithelial tissues, muscle tissue, and vascular tissue. The cells within the different tissues are held together by cell junctions, such as tight junctions and gap junctions.
