Living organisms are distinguishable from non-living things. Living things exhibit specific characteristics which are not expressed by a non-living thing. Locomotion or movement is one among them. Every living organism is made up of a special system for locomotion. Let’s have a glance of joint and its types which help a human to move his/her body parts easily and comfortably.
Joint and Types of Joints
Locomotion is the process of movement from one place to another. Locomotion of a body is the effort of bones and muscles present in them. The skeletal system is a framework of bones in a human body. Skeletal system includes bones from top to bottom. Throughout these bones, we can observe different types of joints.
Bones help us to rotate our shoulder, bend our knees and elbows, etc. This flexibility is because of joints present in our body. A joint is a point where two bones meet and aid in the movements. Bones are attached to one another by tissues called ligaments. There are two types of joints: movable joints and fixed joints.
Movable Joints: Movable joints are flexible, they are movable, can slide over one another, rotatable and so on. Movable joints include our shoulder joint, neck joint, knee joint, wrist joint, etc. Some of the basic movable joints are as below:
- Ball and socket joints: Here one bone is hooked into hollow space of another bone. This type of joint helps in rotatory movement. Ex: Shoulder.
- Pivotal Joints: In this type of joint, one bone has trapped into the other in such way that full rotation is not possible. Pivotal joints aid in side-way and back-forth movement like in neck.
- Hinge joints: Hinge joints are like door hinge where only back and forth movement is possible. Ex: Fingers and toes, Knee, elbow, etc.
Fixed Joints: Fixed joints, also called immovable joints are found where bones are not flexible. In such joints, bones have been fused together in such a way that they are fixed to that part. A common example is a skull which is made up of a number of bones fused. Other examples are upper jaw, rib cage, backbone, pelvic bone, etc.
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