Joints - Classification by Movement

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Joints - Classification by Movement
Joints can be classified by how much movement they allow. * Synarthroses: Immovable joints. Specific examples of synarthroses are suture joints (the joints in the skull) and synchondroses (the type of joint found in growth plates). * Amphiarthroses: Slightly moveable joints. A specific example of an amphiarthrosis is a symphysis (such as the joint between two vertebrae). * Diarthroses: Freely moveable joints. Specific examples of diarthroses are typical synovial joints such as the shoulder and wrist. *
Fibrous Joints * Fibrous joints are connected only by fibrous ligaments. A ligament is dense connective tissue that connects bone to bone (as opposed to tendons, which connect muscles to bones). Ligaments are named based on their position or based on the bones they attach.

There are 3 distinct types of fibrous joints: 1. Suture Joints 2. Gomphoses 3. Syndesmoses

Cartilaginous Joints | The next broad classification of joints we will discuss are cartilaginous joints. Cartilaginous joints are joined by either hyaline cartilage or fibrocartilage. The cartilage of cartilaginous joints is avascular and anervous except at the margins. Hyaline cartilage is slippery and strong when compressed, but has little tensile strength (strength against being stretched). Fibrocartilage, on the other hand, is tough and strong both when compressed and when stretched (high tensile strength). There are two distinct types of cartilaginous joints: 1. Synchondroses 2. Symphyses Synovial JointsSynovial joints are the most common, most moveable and most complex type of joint. Thus, we will spend a little more time on this joint type. Essentially, all synovial joints are diarthroses (freely moveable) thereby giving us the flexibility to walk, throw a ball, write, etc.Synovial joints have a general structure…...

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