A Streamlining your body reduces the friction of movement to a minimum thus decreasing overall drag. For fishes having a streamlined body that is smooth helps save energy it would otherwise have to expend swimming.
How does the streamlined body of fish help them to move Class 6?
The streamlined shape helps the fish to move in water. The skeleton of the fish is covered with muscles which make the front part of the body to curve to one side and the tail part swings towards the opposite side. This makes a jerk and pushes the body forward. In this way, it moves in the water.
How does streamlined body help water animals?
Streamlined bodies help reduce water resistance and friction between the water and the organism,allowing it to swim faster to escape from its predator or to catch its prey.
Why do fishes have a streamlined body?
Birds have streamlined body so as to reduce the air resistance during flying. Whereas fishes have streamlined body so as to reduce friction in water and help them to move faster.
Do upper jaw bones move Class 6?
We cannot move the upper jaw because it is connected to the skull by a fixed joint. There is a fixed joint between the skull and the upper jaw.
How does a fish swim class 6?
Fishes swims by moving its body and tail in opposite direction to each other, they stretch the body and relaxing the tail in opposite direction this forms a curve, then quickly the body moves other side and the tail on the opposite this creates the jerk and pushes the fish in forward direction.
What animal has a streamlined body shape?
– Three animals that have streamlined bodies are fishes, birds and snakes. Presence of this kind of body shape is advantageous for their living.
Is the example of streamlined body?
The shape of the body is said to be streamlined if the body tapers at both ends. Examples: Fishes have streamlined bodies so that they have less resistance when swimming in water. Birds have a streamlined body to make their flight easier through the air. Snakes have a streamlined body to assist them move forward.
What type of body is called streamlined body?
A streamlined body is a shape of body that reduces resistance when moving. … Treamlined bodies often have a teardrop shape. Some animals, such as sharks and dolphins, are streamlined so that they have less resistance when swimming in water.
What would happen if fish do not have streamlined body?
(i) The streamlined body shape (boat shape) allows the fish to move easily in water. (ii) Fishes cannot survive outside water because fishes have gills which help them to use the oxygen dissolved in water. Gills are unable to absorb atmospheric oxygen, due to which the fish will die when removed out of water.
Why do fish has its shape?
A fish is shaped for where it lives and how it feeds. A fish with a torpedo shape can swim quickly through the water. A fish that is flat can easily hide on the bottom of the water. … A fish’s mouth shape is adapted to the food it eats.
How is the body shape of a fish?
Bony fishes show great variety in body shape, but the “typical” fish body shape is roughly cylindrical and tapering at both ends. This characteristic fusiform shape is quite energy efficient for swimming. … A depressed (flattened, top-to-bottom) body shape is common in bottom-dwelling fishes.
Which body part Cannot move at all?
Explanation: The skull is combined of many bones but they cannot move, and we cant move the middle of the bones.
Why we Cannot move our elbow backwards?
(c) Our elbow cannot move back because it has a hinge joint which allows the movement in one plane only.
Can neck rotates completely?
Pivot joint is present where the neck joins the head. It permit the bones to turn around or rotate but does not allow complete rotation of our head. so, we cannot rotate our head completely but we can turn our head in four directions i.e., right, left, forward, and backward.