Question

Example of a pivot joint is
a. Atlanto-axial joint
b. Shoulder joint
c. Hip joint
d. None of the above

Answer 1

The pivot joint is also known as a rotary joint and a trochoid joint, in the vertebrate anatomy, this is a freely moveable joint which allows only a rotary movement around a single axis. The bone which is moving it rotates within a ring and that is formed from a second bone or adjoining ligament.

Complete answer:
This atlantoaxial joint is an upper part of the joint which is between the neck and the first and second cervical vertebrae of the atlas and the axis. This is a pivot joint. This type of joint is a complicated nature. Four distinct joints and it consists of no fewer. Also, there is a pivot articulation between the odontoid process of the axis and the ring which is formed by the anterior arch and the transverse ligament of the atlas. In total there are three types of atlantoaxial joint:
i. One is between the posterior and the surface of the anterior arch of the atlas or the front of the odontoid process.
ii. The other one is between the anterior surface of the ligament and back of the odontoid process.

Shoulder joint: This shoulder joint mainly is a ball and the socket joint between the scapula and the humerus. Mainly it is a major joint that connects the upper limb to the trunk. This is one of the most mobile joints in the human body, at cost of joint stability.

Hip joint: This is the hip joint it is the articulation of the pelvis with the femur, which connects the axial skeleton it is a skeleton with the lower extremity. This adult os coxa and a hip bone are formed with the help of fusion of the ilium, or the pubis which occurs by the end of the teenage stage.

Hence, the correct answer is option (A).

Note: The bone is made up of calcium, sodium and phosphorus, or the other minerals, and as well as the protein collagen. These are the function skeleton of the human body and they allow them to protect the body parts from impact damage.