Tag: skeleton, joints and muscles

Freely movable joints are the most complex of the joints. Freely movable joints come in different shapes and allow different movements. Six types of freely movable joints exist. The ball-and-socket joint, of which the shoulder is an example, has a ball-shaped head and allows the widest range of motion. The elbow is a hinge joint and is able to move in only one plane etc. Therefore, (a) is the correct answer. 

A synovial joint joins bones with a fibrous joint capsule that is continuous with the periosteum of the joined bones, constitutes the outer boundary of a synovial cavity, and surrounds the bones' articulating surfaces. The synovial (or joint) cavity is filled with synovial fluid. They are the most common and most movable type of joint in the body of a mammal. 

An immovable joint is a place in the body where two bones are joined together but where little or no movement is normally possible and where no joint cavity exists. e.g. skull.

Walking and playing in fresh air keeps the body fit and healthy. One must also have a balanced diet and maintain a healthy body weight.

Ulna is produced into an oleander process, to articulate into olecranon fossa and tracheal of humerus by a hinge joint. 

Synovial fluid is present in perfect movable joints. The synovial membrane secretes synovial fluid which lubricates and provides nourishment to articular
cartilage.

A synarthrosis is a fixed joint between bones connected by fibrous tissue. A suture is a type of fibrous joint that is only found in the skull. The sutures between bones of the skull is an example of synarthrosis. So, the correct answer is 'Synarthrosis'. 

• Joints are points of contact between bones, or between bones and cartilages.
  
• A suture is a type of fibrous joint that is only found in the skull. Parietals are the bones present in the skull.
• Sutural joints are present between parietals (bones of the skull)of the skull.
• So, the correct answer is 'Parietals of the skull'.

• Joints are points of contact between bones, or between bones and cartilages.
  
• A suture is a type of fibrous joint that is only found in the skull. The skull bones are joined by the sutures.
• Parietal bone and temporal bone are skull bones.
• Hence parietal bone and temporal bone of skull are joined by fibrous joint.
• So, the correct answer is 'Parietal bone and temporal bone of skull are joined by fibrous joint'.

A suture is a type of fibrous joint that is only found in the skull. The bones are bound together by Sharpey's fibers. A tiny amount of movement is permitted at sutures, which contributes to the compliance and elasticity of the skull which is immovable.