BIOLOGY [2 Mark Question Answer]

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

The ribs are the bony framework of the thoracic cavity. The ribs form the main structure of the thoracic cage protecting the thoracic organs, however their main function is to aid respiration. There are twelve pairs of ribs. Each rib articulates posteriorly with two thoracic vertebrae by the costovertebral joint.

A typical vertebra consists of a body and a vertebral arch. The arch is formed by the paired pedicles and paired laminae. Arising from the vertebral arch are the transverse, spinous, superior articular, and inferior articular processes. The vertebral foramen provides for passage of the spinal cord.

The bones of the appendicular skeleton make up the rest of the skeleton, and are so called because they are appendages of the axial skeleton. The appendicular skeleton includes the bones of the shoulder girdle, the upper limbs, the pelvic girdle, and the lower limbs.

Your axial skeleton is made up of the 80 bones within the central core of your body. This includes bones in your skull (cranial and facial bones), ears, neck, back (vertebrae, sacrum and tailbone) and ribcage (sternum and ribs).

The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals. The skeletal system is also called the musculoskeletal system.

Ball-and-Socket joints are the most mobile of all synovial joints. They allow the bone with the ball head to be moved freely in all planes, Whereas hinge joints allow restricted movements in one plane only.

Locomotion is the displacement of a body from one place to another. On the contrary, movement is the displacement of a body or a part of the body from its original position.