Question

Which of the following is an immovable joint?
(a)Synarthrosis
(b)Hinge joint
(c)Gliding joint
(d)None of the above

Answer 1

Hint: These immovable joints are present in skull sutures, articulations between the teeth and the mandible, and the joint found between the first pair of ribs and the sternum.

Complete answer:
-An immovable joint connects the ends of the bones through tough fibrous tissue.
-Synarthrosis is a type of immovable joint present in skull sutures.
-A synarthrosis is a type of joint where there is no movement under normal conditions.
-The synarthrosis doesn’t allow any movement under normal conditions at all.
-The strong union between the articulating bones is provided due to this immobile nature of the articulating bones.
-This joint is present in locations where the bones provide protection for internal organs.
-The sutures present in the skull bones are the fibrous joints that surround and protect the brain.
-The bones present in fibrous joints are held together by fibrous connective tissue. There is no cavity, or space, between the bones, that’s why this joint is immovable.
-These joints are also present in the manubriosternal joint that is a cartilaginous joint that unites the manubrium and body of the sternum for protection of the heart.
So, the correct answer is ‘Synarthrosis’

Note: -Hinge and the gliding joints are the synovial joints.
-The gliding joints provide a gliding movement in the plane of the articular surfaces.
-Examples of gliding joints include the carpal joints of the wrist, the tarsal joints of the ankle.
-Hinge joint examples are the elbow, knee, ankle, wrist, fingers, toes, and jaw.
-Hinge joint provides movement in only one direction.