The type of joint in elbow of our forelimb undergoes similar movement as of the door joint of the house. Which joint is this?

Option 3 : Hinge joint

Concept :

Joints :

• Joints are the contact points between bones, or between bones and cartilages.
• The muscles generated force through joints which are used to carry the movement, where joints act as a fulcrum.
• Joints are important for all types of movements that involve the bony parts of the body.

Explanation :

• The joints are functionally classified on the basis of the type of movement they allow.
• There are six types of joints :

 1) Ball and socket joint 2) Pivotal joint 3) Hinge joint 4) Gliding joint  5) Saddle joint 6) Fixed joint

• Saddle joints are those which allow movement in two planes. E.g. Joint of the thumb.
• Ellipsoid joints are those which allow movement in two planes i.e. back and front and side to side. E.g. joint in wrists.
• The bones of birds are hollow and the forelimbs are modified to form wings.