If you count the true arm: The shoulder has a ball and socket joint.
The elbow has a hinge joint (ulna) and a pivot joint (radius).
If you count the forearm:
The forearm has a fibrous joint (syndesmosis) between the radius and ulna.
The wrist is a very complex set of joints, if I remember correctly they are mostly saddle joints and gliding joints.
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The most movable joints in the limbs are the shoulder and hip joints. These are ball-and-socket joints that allow for a wide range of motion in multiple directions.
Most joints within the skeletal system are synovialjoints. Which allow free movement. They are more complex structually than fibrous or connective joints.
Apodicular joints are joints in arthropods that allow for movement and flexibility, such as in the limbs of insects. These joints enable arthropods to perform various activities, including walking, jumping, and grasping objects. The structure of apodicular joints can vary depending on the specific type of arthropod and its functional requirements.
Upper limbs have arms, hands, and fingers, while lower limbs have legs, feet, and toes. Both upper and lower limbs are important for various activities such as movement, balance, and fine motor skills.
ribs and vertebrae (semi mobile joints) vertebrae (cartilaginous joints) elbow & knee (hinged joints), hip and shoulder (ball and socket joints), neck (rotational glide), wrist (compound rotational).
Limbs are the parts of the body used for movement and manipulation, such as arms, legs, and wings. Ligaments are tough bands of tissue that connect bones to other bones at the joints, providing stability and limiting movement to prevent injury.
Most artificial limbs need to be specially fitted to a person. They are not available for purchase in a regular store. See a doctor if one has questions about artificial limbs.