Column I |
Column II |
Upper jaw |
have fins on the body |
Fish |
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 |
Column I |
Column II |
Upper jaw |
is an immovable joint |
Fish |
have fins on the body have a streamlined body |
Ribs |
protect the heart |
Snail |
shows very slow movement |
Cockroach |
has an outer skeleton can fly in the air |
a) |
A ball and socket joint is a moveable joint. The rounded end of one bone fit into the cavity (hollow space) of the other bone. It allows movement in all directions. Example: shoulder joints. |
b) |
Only the lower jaw in skull bones is movable. |
c) |
Elbow joint is an example of hinge joint which allows movement back and forth. Therefore, we cannot move our elbow backwards. |
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