What Are Animals?

Animals are multicellular eukaryotic organisms that are members of the biological kingdom Animalia. They are capable of moving, eating and breathing organic matter, and are sexually reproducing. The most basic definition of animals is that they are “beasts” or “living things that don’t live in the water.” Whether an animal is a cat or a dog, they all have unique needs. In addition, there are many differences between different species.


Despite their diversity, animals are the most similar to humans in the physical characteristics that distinguish them from plants. All animals have a central nervous system and musculoskeletal system that allow them to move, reproduce, and store food. They also possess a reproductive system that produces offspring to maintain a species. The body of an animal is composed of different organ systems, and each one is crucial to its health. This is why animals differ from plants.

In addition to a nervous system and muscles, animals have specialized sensory systems including the eyes, ears, nose, skin, and tongue. Each organ works in different ways to help an animal survive. Most animals reproduce sexually with a haploid sperm cell and an egg, which unite to form a diploid zygote. However, some animals reproduce asexually, using a process known as parthenogenesis.

Animals differ from plants in that they have a musculoskeletal system, a nervous system, and a reproductive system. This means that animal physiology differs from that of plants, and some animals become sessile later in life, but most animals remain permanently attached to their substrates. They are more mobile than plants and have the ability to move around on their own. The skeletal system of an animal is responsible for controlling the body’s functions, and its nervous system controls these processes.

The nervous system of an animal is a complex network of nerve cells and muscles. It processes information from sensory organs and transmits signals to other parts of the body. The digestive system receives food, while the circulatory system carries oxygen and nutrients to cells. The reproductive system is responsible for ensuring the survival of a species. The various organs in an animal differ from those of a plant in their physiology. In addition, animals have an embryonic stage known as the blastula that allows the cell to differentiate.

Animals have organs and tissues, which perform specific functions. They have a musculoskeletal system, a nervous system, and a reproductive system. All of these parts are important for the body of an animal. Its brains control the various body functions, while the endocrine glands secrete hormones that regulate body functioning. A reproduction system helps an animal to produce offspring, which ensures the survival of the species.