Types of Joint Flashcards
How are joints functionally classified?
Joints are functionally classified based on their range of motion and the type of movement they allow. This includes classifications such as synarthroses (immovable joints), amphiarthroses (slightly movable joints), and diarthroses (freely movable joints)
What are sutures?
Sutures are the fibrous joints between the bones of the skull that surround and protect the brain
What is the role of intervertebral discs?
Intervertebral discs are cartilaginous joints that sit between the vertebrae in the spine. They act as shock absorbers, allow slight movement of the vertebrae, and contribute to the spine’s flexibility
Why do joints differ in their degree of mobility?
Joints differ in their degree of mobility based on their structure, location, and the demands placed on them by the body. Factors like the type of connective tissue involved, the presence of a joint cavity, and the shape of the articulating surfaces influence the range of motion and stability of each joint
What are the three main types of functional joint classifications?
The three main types of functional joint classifications are synarthroses (immovable joints), amphiarthroses (slightly movable joints), and diarthroses (freely movable joints).
What is the primary function of synovial joints?
The primary function of synovial joints, a type of diarthrosis, is to allow a wide range of movements due to the presence of a fluid-filled joint cavity.
How do cartilaginous joints differ from fibrous joints?
Cartilaginous joints are connected by cartilage and allow more movement than fibrous joints, which are connected by dense connective tissue and typically allow very little or no movement.
What is the role of ligaments in joint stability?
Ligaments are tough bands of fibrous tissue that connect bones at joints, providing stability and limiting excessive movement.
Can you name an example of a pivot joint in the human body?
An example of a pivot joint is the joint between the first and second cervical vertebrae (the atlas and axis), which allows for the rotation of the head.
What type of joint is the knee, and what movements does it allow?
The knee is a hinge type of synovial joint, primarily allowing for flexion and extension movements.
What is the key characteristic of ball-and-socket joints, and where can they be found in the human body?
Ball-and-socket joints allow rotational movement in all directions and can be found in the hip and shoulder joints.
Describe the structure and function of hinge joints.
Hinge joints, like those in the elbows and knees, are formed between two or more bones where the bones can only move along one axis to flex or extend.
What is a saddle joint, and where is it located in the human body?
A saddle joint allows movement in two planes (biaxial movement) and can be found in the thumb, at the carpometacarpal joint.
How do gliding joints work and where are they typically located?
Gliding joints allow bones to slide past each other and are typically found in the carpals of the wrist and the tarsals of the ankle.
What is the significance of synovial fluid in joint movement?
Synovial fluid lubricates synovial joints, reducing friction and allowing for smooth movement of the articulating bones.
