what are the three types of joints in the skeletal system?
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The adult human skeletal system has a complex architecture that includes 206 named bones connected by cartilage, tendons, ligaments, and three types of joints: synarthroses (immovable) amphiarthroses (slightly movable) diarthroses (freely movable)
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The skeletal system includes the bones of the skeleton and the cartilages, ligaments, and other connective tissue that stabilize or connect the bones. In addition to supporting the weight of the body, bones work together with muscles to maintain the body's position and to produce controlled, precise movements.
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So, what are the different types of bones? How are they categorized? There are five types of bones in the skeleton: flat, long, short, irregular, and sesamoid. Let's go through each type and see examples.
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Skeletal system. The skeleton is the central structure of the body and is made up of bones, joints and cartilage. The skeleton provides the framework for muscles and gives the body its defined human shape.
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Synovial joints allow bones to slide past each other or to rotate around each other. This produces movements called abduction (away), adduction (towards), extension (open), flexion (close), and rotation. There are six types of synovial joints.
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['Nonsystematic joints. ... ', 'Systematic joints. ... ', 'Columnar jointing. ... ', 'Tectonic joints. ... ', 'Hydraulic joints. ... ', 'Exfoliation joints. ... ', 'Unloading joints. ... ', 'Cooling joints.']
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The skeletal system in vertebrates is divided into the axial skeleton (which consists of the skull, vertebral column, and rib cage), and the appendicular skeleton (which consists of limb bones, the pectoral or shoulder girdle, and the pelvic girdle).
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Joints, particularly hinge joints like the elbow and the knee, are complex structures made up of bone, muscles, synovium, cartilage, and ligaments that are designed to bear weight and move the body through space. The knee consists of the femur (thigh bone) above, and the tibia (shin bone) and fibula below.
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These joints can be described as planar, hinge, pivot, condyloid, saddle, or ball-and-socket joints. Figure 1. Different types of joints allow different types of movement. Planar, hinge, pivot, condyloid, saddle, and ball-and-socket are all types of synovial joints.
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['Gliding joints: only allow sliding movement.', 'Hinge joints: allow flexion and extension in one plane.', 'Pivot joints: allow bone rotation about another bone.', 'Condyloid joints: perform flexion, extension, abduction, and adduction movements.']
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['Human Axial Skeleton. The axial skeleton forms the central axis of the human body and includes the bones of the skull, the ossicles of the middle ear, the hyoid bone of the throat, the vertebral column, and the thoracic cage (ribcage). ... ', 'The Skull. ... ', 'The Vertebral Column. ... ', 'The Thoracic Cage.']
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['The elbow: The elbow joint is a synovial hinge joint with two articulations. The trochlea of the humerus articulates with the trochlear notch of the ulna, and the capitulum of the humerus articulates with the head of the radius. ... ', 'The radioulnar joints: Two separate joints exist between the radius and the ulna.']
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Joints are responsible for movement (e.g., the movement of limbs) and stability (e.g.,the stability found in the bones of the skull). There are two ways to classify joints: on the basis of their structure or on the basis of their function.
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Fibrous joints are where adjacent bones are strongly united by fibrous connective tissue. The gap filled by connective tissue may be narrow or wide. The three types of fibrous joints are sutures, gomphoses, and syndesmoses.
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Bony joints are the most common type of joints. Fibrous joints are joints, at which two bones are united by hyaline cartilage. Symphyses are the most common type of fibrous joints. Synovial fluid is rich in albumin and hyaluronic acid, which give it a viscous texture similar to egg white.
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['Isolation joints (also sometimes functioning as expansion joints)', 'Construction joints (which can also function as contraction joints)', 'Contraction joints (also sometimes called control joints)']
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['Pivot Joints Move Side to Side. A pivot joint provides for rotation around only one axis. ... ', 'Hinge Joints Bend Your Limbs. ... ', 'Ball and Socket Joints Provide Rotation. ... ', 'Condyloid Joints Twist and Bend. ... ', 'Saddle Joints Have a Unique Shape. ... ', 'Gliding Joints Allow Smooth Motion.']