class6 movements

                                                                   Class 6  Science

Lesson-9      Movements in the body

Q/Ans.

Q1. Enumerate the functions of the skeletal system in our body.

Ans: The functions of the skeletal system in our body are:

1.    It forms the framework of our body, provides shape and support and holds the body upright.

2.    It helps in the movement of various parts of the body.

3.    It protects the internal organs of our body.

4.    Bones are filled with spongy mass called bone marrow where blood cells are formed.

Q2. What are the functions of the ribcage?

Ans: The functions of the ribcage are:

1.    It protects our important organs such as the heart and the lungs.

2.    It also protects the parts of the stomach and kidneys.

Q3. What are the functions of the spine?

Ans: The functions of the spine are:

         1.  It helps in supporting our skeleton.

         2.  It also helps in bending and twisting our back.

Q4. Describe with examples the four movable joints in our body.

Ans: The four movable joints in our body are:

1.    Hinge joint:

·        They allow movement in only two directions-backward and forward or upward and downward like hinges on the door.

·        Example: elbow and knee joint.

2.    Ball and socket joint:

·        In this joint, a ball like end of one bone fits into a cup-shaped socket of the other bone.

·        They allow maximum movement in all the directions.

·        Example: hip and shoulder joint.

3.    Pivot joint:

·        It allows sideways as well as up- down movement.

·        Example: It is found in the neck.

4.    Gliding joint:

·        They help the back to bend and twist.

·        Example: ankles and wrists.

Q5. Mention the role of X-rays in the field of medicine.

Ans:  1. It is possible to see the images in a living being using radiations called X- RAYS.

   2. Doctors can identify the bone injury with the help of X- rays.