Question

describe the various kinds of Skeleton joints in the human body according to their mobility give one example of each

Answer 1

A joint is a point where two or more bones meet. There are three main types of joints; Fibrous (immovable), Cartilaginous (partially moveable) and the Synovial (freely moveable) joint.

Fibrous Joints
Fibrous (synarthrodial): This type of joint is held together by only a ligament. Examples are where the teeth are held to their bony sockets and at both the radioulnar and tibiofibular joints.

Cartilaginous
Cartilaginous (synchondroses and symphyses): These joints occur where the connection between the articulating bones is made up of cartilage for example between vertebrae in the spine.

Synchondroses are temporary joints which are only present in children, up until the end of puberty. For example the epiphyseal plates in long bones. Symphesis joints are permanent cartilaginous joints, for example, the pubic symphysis.

Synovial Joints
Synovial (diarthrosis): Synovial joints are by far the most common classification of a joint within the human body. They are highly moveable and all have a synovial capsule (collagenous structure) surrounding the entire joint, a synovial membrane (the inner layer of the capsule) which secretes synovial fluid (a lubricating liquid) and cartilage known as hyaline cartilage which pads the ends of the articulating bones. There are 6 types of synovial joints which are classified by the shape of the joint and the movement available.

Types of Synovial Joint
The hinged joint is found at the elbow and the knee and movements available are flexion and extension.
The pivot joint is found at the top of the spine (atlas and axis bones) and allows rotation of the neck.

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Answer 2

Answer:

The locus on our body where two bones meet are called joints. Joints help improve the mobility of the human body.

The various kinds of Skeleton joints in the human body according to their mobility are as follows-

Based on their mobility, joints are divided into three main groups.

1. Fiber joint:

These hinder movement because the bones are tightly connected to each other by strong collagen fibers. For example:

• Skull and tooth joints.

2. Cartilage joints:

The two bones are joined by a disc or pad of white fibrous cartilage. example:

• sternum, ribs, spine, etc.

3. Synovial joints:

These are free-moving joints that allow movement in one or more directions. The bones are lined with a membrane called the synovium, and the cavities are filled with synovial fluid.

These are other different types:

• Ball joint on shoulders and hips.
• Elbow joint and knee joint hinge his joint.
• Pivot joint of radius and ulna below the elbow.
• gliding joint of wrist and tassel.
• Carpel and metacarpal saddle joints of the human thumb.
• Condyloid joints of the fingers

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