NCERT Solutions and Notes for Class 6 Science Chapter 5: Body Movements

NCERT Class 6 Science Chapter 5 Notes are designed by our subject experts who have provided detailed explanations of important aspects. In addition, we have also included some infographics for the benefit of students. Moreover, for your better understanding, we have compiled all relevant information under a single topic. Furthermore, you can also get help from our NCERT solutions to score good marks on your tests. The question-answer section of the notes has accurate answers and are according to the contents of the chapter- “Body Movements’

Explore all the Chapters of Class 6 Science:-

Chapter 1	Chapter 2	Chapter 3	Chapter 4	Chapter 6
Chapter 7	Chapter 8	Chapter 9	Chapter 10	Chapter 11

Also Read: Interesting Science Experiments for Class 6

Summary of NCERT Class 6 Science Chapter 5

The Chapter ‘Body Movements’ deals with different parts of the human body that help in mobility. Also, it enlists the importance of bones, muscles, joints, and cartilage in body motion. Additionally, while learning about body movements in humans, we gain knowledge about Gaits/Movements in animals like earthworms, cockroaches, snails, snakes, etc.

Body Movements Class 6 Notes

Let us now dive into important concepts in the NCERT Class 6 Science Chapter 5 and learn all the related topics!!

Body Movements

The ability of humans, animals, birds, and other organisms to change positions with the help of their body parts is known as body motion or movement.

Skeletal System

The skeletal system in the human or animal body provides structure and support to the body. Here is a detailed description of all important parts of the skeletal system.

• Skeleton: It refers to the internal structure of the human and animal body. It is made up of bones and has the following functions:

1. It forms the framework of the body. This framework gives shape to the body and offers support to humans and animals.
2. In the skeleton, several types of bones are joined with each other with the help of joints. These joints are responsible for different types of body movements. 
3. In evolved animals like humans, bones are supported by cartilage and muscles to complete the body’s movement.

• Muscles: This part of the skeletal system may be attached to bones or work alone to help in body movement. 
• Cartilage: This part of the skeleton is softer than bones and can be easily bent. It is present at the nose tip, the upper part of the ear, and the tips of the long bones of the human and animal body.
• Joints: The points where two skeleton components are connected to allow for mobility are known as joints. Some examples of joints are Knee joints, Hip joints, Elbow joints, etc.

Also Read: Science Projects for Class 8th

Types of Joints

The human body has the following types of joints that help in body movement:

• Ball and Socket Joint: When the rounded end of a bone fits into the hollow or cavity of another bone is known as the ball and socket joint. It is found in the shoulders and hips of the human body. It helps in the mobility of these parts in all directions.

• Pivotal Joint: A cylindrical bone that rotates in a ring is said to have a pivotal joint. It enables us to turn our heads to the left or right and bend our heads forward and backward. This joint is present in our neck. It joins the neck to the head.

• Hinge Joint: This joint is found in the knees and elbows of the human body. It helps our hands and legs make forward and backward movements. 

• Fixed Joint: It is an immovable joint as it is present where bones are connected together. This joint is present in the skull. 

Parts of a Human Skeleton

• Skull: Important parts of the skull are the cranium and facial bones. Here are the details:

1. Cranium: Cranial bones are flat. It covers and protects the brain from damage.
2. Facial Bones: These include the lower jaw and upper jaw. The lower jaw is movable and helps us talk, sing, and eat. Whereas, the upper jaw is immobile. 

• Backbone: Also known as the vertebral column, the backbone has 33 small vertebrae joined end to end. This bone creates a hollow tube. 

• Rib Cage: The rib cage in the human body consists of 12 pairs of ribs. It forms a conical-shaped structure that protects the heart and other internal organs.  

• Shoulder Bones: The shoulder blade and the collarbone combine to form the shoulder bone. The shoulder blades have broad, flat bones. They aid in the formation of lengthy bone joints.

• Pelvic Bones: Three bones join together to form the pelvic bone. The pelvic bones are big and flat, just like the shoulder bones. They aid in the formation of lengthy bone joints. It joins the final two segments of the backbone to produce the enormous bony bowl known as the pelvis.

Also Read: Human Muscular System

Gaits of Animals

Gaits of animals refer to the various movement styles that animals exhibit as a result of variations in their skeletal structures.

• Earthworm: 

1. The body of an earthworm is made up of rings and muscles. The rings are connected from end to end. The muscles are joined to these rings. This structure helps earthworms shorten and extend their body.
2. An earthworm does not have an internal skeletal structure.
3. As earthworms do not have any internal skeleton, they move with the help of body muscles. The movement is due to repeated contraction and extension of the body. 

• Cockroach:

1. A cockroach’s body is covered in a hard outer skeleton constructed of separate units linked together.
2. It has two sets of wings linked to the breast and three pairs of legs for walking.
3. Its unique muscles are employed to move the body.
4. It walks with the muscles in the legs.
5. Although they are not particularly good flyers, the breast muscles linked to the wings aid in flight.

• Snail:

1. Snails use their strong, flat foot to help them move.
2. They move smoothly over a mucus-lubricated solid surface.

• Birds:

1. In order to fly, birds have unique muscular and skeletal systems.
2. The forelimbs have been altered to form wings, and the inside bones have been hollowed out to facilitate flight.
3. For walking and perching, animals use their hind limbs’ bones.
4. Strong flight muscles that raise and lower the wings are supported by the shoulder and breastbones.

• Fish:

1. Fish have streamlined bodies that make swimming more efficient.
2. Small jerks across the water are made with their tail fin, while other fins help in swimming.
3. Changing directions is another function of the tail fin.

• Snakes:

1. Snakes do not have legs. Instead, they move by using their long backbone and muscles.
2. Because of the numerous loops in their body, they may move forward by pressing against the ground.

Download NCERT Science Class 6 Science Chapter 5 Important Questions and Answers PDF

Explore all the Chapters of Class 6 Science:-

Chapter 1	Chapter 2	Chapter 3	Chapter 4	Chapter 6
Chapter 7	Chapter 8	Chapter 9	Chapter 10	Chapter 11

Important Questions and Answers in CBSE Class 6 Science Chapter 5

Here are solutions to all Exercises in NCERT Class 6 Science Chapter 5. Use them to complete your homework and score well in your weekly exams and mid-terms.

Ques 1: Fill up the blanks:

1. Bone joints help in the ______________ of the body.
2. A combination of cartilage and bones forms the ___________ of the body.
3. Elbow bones are joined together by a ________________ joint.
4. Contraction of the _____________ helps pull bones during movement.

Ans:

1. Movement
2. Skeleton
3. Hinge
4. Muscles

Ques 2: Which of the following statements are true or false:

1. In animals, locomotion and movement are exactly the same.
2. Bones are softer than cartilage.
3. There are no joints in the finger bones.
4. The forearm has two bones.
5. Cockroaches have an external skeleton.

Ans:

1. False
2. False
3. False
4. True
5. True

Ques 3: Match the following

Cockroach	Have a streamlined body
Snail	Have fins on the body
Ribs	Can fly in the air
Fishes	Moves very slowly
Upper Jaw	Is an immovable joint
	Has an outer skeleton
	Protect the heart

Ans:

• Cockroach- Has an outer skeleton; Can fly in the air
• Snail- Has an outer skeleton; Moves very slowly
• Ribs- protect the heart
• Fishes- Have fins on the body; Have a streamlined body
• Upper Jaw- Is an immovable joint

Ques 4: Which part of the skull is movable?

Ans: Lower Jaw

Ques 5: What do you mean by a ball and socket joint?

Ans: When the rounded end of a bone fits into the hollow or cavity of another bone is known as the ball and socket joint. 

Ques 6: Why can the human elbow not move backward?

Ans: Our elbow is unable to move backward as they have hinge joints that only enable back-and-forth movement. 

Also Read:

NCERT Class 6 Science Chapter 1 Notes: Components of Food

NCERT Class 6 Science Chapter 2 Notes: Sorting Materials into Groups

NCERT Class 6 Science Chapter 3 Notes: Separation of Substances

NCERT Class 6 Science Chapter 4 Notes: Getting to Know Plants

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