MOVEMENT IN ANIMALS
• Without the ability to move, there would be no life on Earth.
• For living, animals have occupied almost all the places that are suitable for life by moving around. Like;
1. The underground soil
2. The surface of the ground
3. Water and air
• Animals need to move in search of food, water, and shelter, and also to escape from predators (Animals that kill and eat other animals).
• The varied nature of moving is indicated even by different sorts of movement like: crawling, digging, walking, running, climbing, jumping, flying, sneaking, floating, gliding, trotting, galloping, and so on.
• By movement we usually mean displacement from one place to another. But an animal can also simply move its body or limbs – that is, change their position.
• A large number of animals move around using their limbs and the limbs are moved by muscles.
• Animals move in different ways. Some walk, some fly some swim through water, some crawl, some hop, etc.
• There are many other ways in which animals show movement.
• The way an animal moves is linked with its body structure.
• The body structure of an animal that determines the way it moves which is called the backbone.
• Based on the presence or absence of backbone, animals can be divided into two groups–
1. Vertebrates
2. Invertebrates
Vertebrates:
• Animals that have a backbone are called vertebrates.
For example- human beings, birds, fish, snakes, etc
Invertebrates:
• Animals that do not have a backbone are called invertebrates.
For example- insects, spider, jellyfish, etc.
