Movement on Animals
One property that living things have is moving. Animals move in various ways such as walking, running, flying, swimming, edging and so forth. Animals move for various purposes, such as to protect themselves from predators or to search for prey.
Animals can move because they have motion organs. Land animals move with skeletons and muscles, aquatic animals such as fish move with fins, while birds can fly by using wings.
Let's see how the animals can move.
1. Animal Motion in Water
Water has a greater density than air. Water also has a lift that is bigger than air. While the animal body that lives in water has a density smaller than its environment.
Due to the large lifting force and small animal density, aquatic animals such as fish can float (swim) in the water using a small amount of energy.
The body shape of marine animals such as fish also makes it easier for them to swim in the water. For example, many fish have torpedo body shapes (like tuna or dolphins). This body shape allows the fish to wriggle from right to left very easily.
When wriggle the body, the fish will produce a thrust force that accelerates the movement of fish in the water.
In addition to torpedo forms, many fish also have a streamlined body shape that serves to reduce the resistance/friction when moving in the water. Tail and wide fish fins serve to push and control the direction of movement of fish in the water.
Fish often issue a bubble pool that serves to regulate the movement up and down. Fish also has flexible muscle and spine structures that make it easy to move.
2. Animal Motion in the Air
Do you know how birds can fly in the air?
Animals like birds can fly in the air because they have a unique body shape. The body of the bird has a great lift so it can offset the gravitational force of the earth.
One way that birds do to enlarge lift is by using wings while flying. Bird wings have a mild skeletal structure, sternum and strong muscles. The shape of a bird's wings is generally airfoil.
Airfoil-shaped wings make the air flowing at the upper part of the body faster than the bottom. When the wings are flapped, then the air at the top will flow downward as it pushes the bird's body to the top. That way, the bird can remain in the air.
3. Animal Motion in the Land
Animals on land generally have strong muscles and bones. These muscles and bones are needed to overcome inertia (the tendency of the body to remain immobile) and to store the spring energy (elasticity).
The animals will start moving, they will push the ground using their feet. Then, the soil will give the same reverse and opposite force in the animal's legs.
This forces that make the animal body move forward. The larger the animal body, the greater the thrust that the foot should give to the ground in order to fight inertia.
Differences in the structure of the muscles and skeletons in each animal cause them to move agiler than other animals. A lean body shape also makes the blood animal can move faster because the body's friction with the air becomes smaller.
Animals can move because they have motion organs. Land animals move with skeletons and muscles, aquatic animals such as fish move with fins, while birds can fly by using wings.
Let's see how the animals can move.
1. Animal Motion in Water
Water has a greater density than air. Water also has a lift that is bigger than air. While the animal body that lives in water has a density smaller than its environment.
Due to the large lifting force and small animal density, aquatic animals such as fish can float (swim) in the water using a small amount of energy.
The body shape of marine animals such as fish also makes it easier for them to swim in the water. For example, many fish have torpedo body shapes (like tuna or dolphins). This body shape allows the fish to wriggle from right to left very easily.
When wriggle the body, the fish will produce a thrust force that accelerates the movement of fish in the water.
In addition to torpedo forms, many fish also have a streamlined body shape that serves to reduce the resistance/friction when moving in the water. Tail and wide fish fins serve to push and control the direction of movement of fish in the water.
2. Animal Motion in the Air
Do you know how birds can fly in the air?
Animals like birds can fly in the air because they have a unique body shape. The body of the bird has a great lift so it can offset the gravitational force of the earth.
One way that birds do to enlarge lift is by using wings while flying. Bird wings have a mild skeletal structure, sternum and strong muscles. The shape of a bird's wings is generally airfoil.
3. Animal Motion in the Land
Animals on land generally have strong muscles and bones. These muscles and bones are needed to overcome inertia (the tendency of the body to remain immobile) and to store the spring energy (elasticity).
The animals will start moving, they will push the ground using their feet. Then, the soil will give the same reverse and opposite force in the animal's legs.
This forces that make the animal body move forward. The larger the animal body, the greater the thrust that the foot should give to the ground in order to fight inertia.
Differences in the structure of the muscles and skeletons in each animal cause them to move agiler than other animals. A lean body shape also makes the blood animal can move faster because the body's friction with the air becomes smaller.
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