Question

Angular joints are present in between
a. Two skull bones
b. Metacarpal and a phalange
c. Rib and a vertebrae
d. The atlas and axis vertebrae

Answer 1

Hint: Joint is any articulation between two bones in the body and it is broadly classified into many types, but mainly based on the tissue attached, they are divided into a synovial joint, fibrous joint, and cartilaginous joints and all these joints are very strong.

Complete answer:
- Joints are classified into many types both structurally and functionally.
- Structural classification determines how the joints are attached to each other, while functional classification is determined by how the joints move.
- Majorly by the tissue attachment, if the two bones are connected by fibrous tissue, then it is fibrous joints, ex: skull joints, and if two bones are connected by any cartilage-like primary, secondary or hyaline cartilage, ex: symphysis, and other one is a synovial joint, they have a specialized synovial cavity, articular capsule, etc. Ex: knee joint.
- Whereas the given question is about the angular joint, which is based on the movement, means joints having the angular movement. Where it has occurred if it is between joints where there is a change in the angle.
- Based on the movement, they are divided into 4 types, they are angular, gliding, rotation, and circumduction joints.
- Gliding movement occurs between the relatively flat surface bones, and they produce very little movement of bones.
- Rotational movement, which involves the movement of the bone around the longitudinal axis.
- An angular joint is found between the metacarpal and phalangeal joints, and it is the correct answer.

Hence, the correct answer is option (B).

Note: There are some functional joints based on movement, where they cannot come under any type of angular, gliding and rotational are inversion: which involves the sole of feet to move inwards, eversion is opposite to inversion, and some other movements include protraction, retraction, elevation, and the depression.