Updated By SaraNextGen
On March 11, 2024, 11:35 AM
Page No 78: - Chapter 8 Body Movement class 6 ncert solutions Science - SaraNextGen [2024]
Question 3:
Match the items in Column I with one or more items in Column II.
|
Column I |
Column II |
|
Upper jaw |
have fins on the body |
|
Fishes |
has an outer skeleton |
|
Ribs |
can fly in the air |
|
Snail |
is an immovable joint |
|
Cockroach |
protect the heart |
|
– |
shows very slow movement |
|
– |
have a streamlined body |
Answer:
|
Column I |
Column II |
|
Upper jaw |
is an immovable joint |
|
Fishes |
have a streamlined body; have fins on the body |
|
Ribs |
protect the heart |
|
Snail |
shows very slow movement |
|
Cockroach |
has an outer skeleton; can fly in the air |
Answer the following:
Question 4:
(a) What is a ball and socket joint?
(b) Which of the skull bones are movable?
(c) Why can our elbow not move backwards?
Answer:
(a) Ball and socket joint is a movable joint. It consists of a bone that has a round head, which fits into a cup like depression of another bone. This helps the bone to rotate freely. Examples of such joints are hip and shoulder joints.
(b) Mandible bone which forms the lower jaw is the only skull bone that is movable.
(c) The elbow has a hinge joint. This type of a joint allows the movement in one plane only. Therefore, our elbow cannot move backwards.
Also Read : INTRODUCTION-Chapter-9-The-Living-Organisms-&-Their-Surroundings-class-6-ncert-solutions-Science
