⛪Home⇐ Class VI Movements in Animals


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Class VI - Science: Movement in Animals
One Word Answer Questions:
Q) How many bones are found in the human skeleton system?
    
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Q) How many vertebrae are found in the human spine?
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Q) Snakes have an appendicular skeleton. True or False?
    
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Q) Which of the skull bones are movable?
    
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Q) Which animal has an exoskeleton?
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Q) Joints are held at position by strong cords called as?
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Q) The fluid part of the blood is called?
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Q) Palm is made up of?
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Q) Fingers are made up of?
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Q) Leg is made up of?
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Short Answer Questions:
Q) Define Movement and Locomotion.
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Q) Define Ball and socket joint?
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Q) Define Skull?
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Q) How is a bird’s body adapted for flying?
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Q) Explain the importance of rib cage to the body?
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Q) Explain briefly about Locomotion?
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Q) Explain briefly about Locomotion in snail?
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Q) Explain briefly about Locomotion in birds?
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Q) Explain briefly about Skeleton?
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Q) Explain briefly about Backbone?
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Long Answer Questions:
Q) Explain briefly the main functions of the skeletal system?
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Q) Explain various kinds of joints found in our body and give an example of each.
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Q) How do fish move in water?
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Q) Explain the movement of an earthworm?
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Q) Explain briefly about fixed joints?
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Q) Explain in detail about Movements in other animals?
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Q) Explain in detail about Locomotion?
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Q) Explain in detail about Locomotion in birds?
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Q) Explain in detail about Different types of joints?
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Q) Explain in detail about Bones?
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Movements in Animals

Introduction

While doing physical exercise we move our body parts in different ways. We lift and bend our legs, hands and other body parts.Usually, when we have to go a short distance from one place to another, we walk or run. But how do animals like fish, snails, snakes etc.Let us look closely at some of our own movements.

All these movement are done with the help of certain parts of our body that lie beneath our skin. We cannot see these parts directly but we can get a sense of their movement under our skin.

Let us study how muscles and bones help in movement. For this, we will try to observe our body carefully so that we can sense these internal parts from outside. We will also take the help of their pictures

We can perform different types of movements with the help of muscles and bones. They are situated inside the body. We can't see and study them like we can see our hair, skin, eyes, nose, ears etc.

Muscles
  • If you observe a cow, bull or horse, walking or running, you can see some fleshy structures moving beneath their skin, usually around the shoulders and hips.
  • These tender fleshy structures are called muscles.
  • We shall perform a few experiments to find out how these muscles help the various parts of the body to move.
  • We shall also see some of the activities that these muscles perform in the body.
Muscle Exercise
  • Muscles work in pairs. When one of them contracts, the bone is pulled in that direction and the other muscle of the pair relaxes.To move the bone in the opposite direction, the relaxed muscle contracts and the first one relaxes.Thus two muscles have to work together to move a bone.Some muscles are connected directly to bones.
  • Some muscles have round, white, rope-like fibres at their ends that connect them to the bone.
  • These fibrous structures are called tendons.
  • You can feel the tendons in several parts of your body like; for example, above the elbow, beneath the knee, near the ankle
  • Try to find out if you can feel them in other parts of your body.

Almost all our body movements depend on muscles, bones and joints. Expansion and contraction of muscle makes the bone move.Muscles always work in pairs.

Bones
Skeleton

The different bones of different body parts combine together to form a single structure or system. This structure is called the skeleton.

Skeleton

Ligaments

These fibres are called ligaments.You saw earlier that muscles are joined to the bones to help them move. In the same way, two bones are joined together in a special way by fibres. These fibres are called ligaments


Shoulder Bones

Run a finger of your other hand from just below your neck towards your shoulder. Try and locate a raised bonethere and the one behind it. The raised bone is called clavicle and the bone behind it is the shoulder blade.

There are two bones protruding from theshoulder called shoulder bones.

Shoulder Bones

Showing where the clavicle joins the shoulder blade. Now try to locate the joint between the clavicle andshoulder blade.


Rib Cage

Take a deep breath and hold it for a little while. Feel your chest bones by gently pressing the middle of the chest. Count as many ribs as possible.

Rib Cage

Ribs are curiously bent and join the chest bone and the back bone together to form a box. This is called the rib cage. Some important internal parts of our body lie protected inside this cage. Try to guess what those important parts are.


Backbone
Backbone

A long structure running down the middle of his back is called the backbone (spinal cord). The small bones that make up this backbone are called vertebrae. The spinal cord passes through the vertebrae of the backbone.

Pelvic Girdle
Pelvic Girdle
  • Press the area just below your waist with the fingers of both hands as shown in.
  • Can you feel similarly shaped bones on both sides of your body.
  • This is called pelvic girdle
  • This structure is made of pelvis bones.
  • They enclose the portion of your body below stomach.
  • This is also the part you sit on.

  • Skull

    The skull is made up of many bones joined together. It encloses and protects the brain. The joints between the skull bones are fused. They are also called fixed joints.

    Skull
Different types of joints
Ball and socket joint

A joint made by fitting a ball into a socket is called a ball and socket joint. In this joint, a bone can rotate easily in all directions.

socket joint
Hinge joint
Hinge joint

A hinge joint is a common class of synovial joint that includes the ankle, elbow, and knee joints. Hinge joints are formed between two or more bones where the bones can only move along one axis to flex or extend.

Neck joint

Necks and Neck Services. There is more than one way to construct a mandolin neck joint. These include, but are not limited to: the dovetail joint, ...

Neck joint
Fixed joints

Some joints between bones in our head can't move; such joints are called fixed joints. These joints are fused and seem to be a single bone in the skull. When you open your mouth, you can move your lower jawThere is a joint between the upper jaw and the rest of the head. It is a fixed joint. So you cannot move the upper jaw.

Upper Jaw
Movements in other animals

We can move our body parts with the help of muscle bones and joints. all animals have these parts like us Let us study how animals move.

Locomotion

Lets us see how animals move from one place to another. Fill your observations in By analyzing you will see that different animals use different body parts for moving from one place to another (locomotion).

Locomotion in fish

The body of the fish is streamlined. The shape is such that it allows the fish to move in water easily. The skeleton of the fish is covered with strong muscles. While swimming, muscles make the front part of the body swing towards one side while the tail swings its body towards the opposite side. This creates a jerk and pushes the body forward. A series of such jerks help the fish swim forward. The tail fins also aid in this movement

Locomotion in birds

Birds fly in the air and walk on the ground. Birds can fly because their bodies are well suited for flying. Their bones are hollow and light. The bones of the hind limbs are typical for walking and perching. Bony parts of the fore limbs are modified to hold muscle of flight which is used to move the wings up and down

Locomotion in snake

Snakes have a long back bone and several muscles. Usually the snake's body curves into many loops. Each loop of the snake gives it a forward push by pressing against the ground. This helps the snake move forward very fast. There are other ways in which snakes move. try to find out about them. Collect those pictures, information and display them on wall magazine

Locomotion in snail

Collect a snail from a garden. Have you seen the rounded structure it carries on it back Place the snail on a glass plate and watch it, when it starts moving Fig.A thick structure may come out of an opening in the shell. the thick structure is its foot, made of strong muscle. The wavy motions of its foot is the reason why a snail moves slowlyDon’t forget to put back the snail from where you collected it. If you let it go away it will die. You are a student with concern towards bio diversity. Movement or locomotion is an important function in every living organism. It is very interesting to watch ants running hurriedly in a line, squirrels and monkeys jumping on trees. Try to enjoy watching various locomotions in the animal kingdom.

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