Syndesmoses, synchondroses, and symphyses are all types of joints in the human body, but they differ in their structure and function.
Syndesmoses
Syndesmoses are fibrous joints where the bones are connected by a ligament or a fibrous membrane. These joints allow for slight movement and are found in areas like the distal tibiofibular joint, where the tibia and fibula bones are connected by the interosseous membrane.
Synchondroses
Synchondroses are cartilaginous joints where the bones are connected by hyaline cartilage. These joints are typically temporary and are found in growing bones, such as the epiphyseal plates in long bones. They allow for growth and eventually ossify, becoming immovable.
Symphyses
Symphyses are also cartilaginous joints, but they are connected by fibrocartilage. These joints are more permanent and allow for limited movement. Examples include the pubic symphysis and the intervertebral discs in the spine. They provide strength and flexibility to the skeletal structure.
In summary, syndesmoses are fibrous joints with slight movement, synchondroses are temporary cartilaginous joints for growth, and symphyses are permanent cartilaginous joints that provide strength and limited movement.