Body Movements

Q14. What is a bone?

Ans. Bone is the hard structure that forms the framework of our body.

Q15. Is it possible for us to bend our body at every point?

Ans. No, we can bend or move our body only at those points where bones meet.

Q16. If our body has no joints then will it be possible for us to move?

Ans. No, it will not be possible for us to move.

Q17. What would have happened if our body was made of single bone?

Ans. We would not able to move if our body was made of single bone.

Q18. Which type of joint is used when a cricket bowler balls the ball?

Ans. Ball and socket joint is used when a cricket bowler balls the ball.

Q19. What type of joint is used while lifting weights?

Ans.  Hinge joint is used while lifting weights.

Q20. How many bones are present in our skull?

Ans. The human skull is generally considered to consist of twenty-two bones.

Q21. How many bones are present in our backbone?

Ans. An adult human backbone has 24 vertebral bones.

Q22. How many muscles are present in our body?

Ans. There are over 600 skeletal muscles within the typical human body.

Q23. What type of substance is secreted by earthworm?

Ans. The body of earthworm secretes a slimy substance to help the movement.

Q24. Why can't we move our upper jaw?

Ans. We can't move our upper jaw because there is a joint between the upper jaw and the rest of the head which is a fixed joint.

Q25. What are pelvic bones?

Ans. The bones that enclose the portion of the body below stomach are called pelvic bones.

Q26. What are joints?

Ans. The places in our body where two parts our body seem to be joined together are called joints.

 
Q27. What skeleton comprises of?

Ans. The skeleton comprises the skull, the back bone, ribs and the breast bone, shoulder and hipbones, and the bones of hands and legs.

Q28. What happens when muscles contracts?

Ans. When contracted, the muscle becomes shorter, stiffer and thicker. It pulls the bone.

 
Q29. Define a skeleton?

Ans. The bones in our body form a framework to give a shape to our body. This framework is called the skeleton.

Q30. Which type of joint allows us to bend our head forward and backward and turn the head to our right or left?

Ans. Pivotal joint allows us to bend our head forward and backward and turn the head to our right or left.

 
Q31. What are cartilages?

Ans. There are some additional parts of the skeleton that are not as hard as the bones and which can be bent. These are called cartilages.

 
Q32. What are the key components of the skeletal system?

Ans. Key components of the skeletal system are bones, ligaments and Joints, tendons and cartilage.

Q33. How do snakes move?

Ans. Snakes slither on the ground by looping sideways. A large number of bones and associated muscles push the body forward.