The Skeletal System

The skeletal system is made up mostly of work up it also consists of tendons, ligaments and cartilage, which are arranged into a solid, rigid, structure that supports and protects our body. bone develop during our lifetime, causing growth and change in appearance. The frame is necessary for survival. The skeletal structure is divided into two parts, the axile skeleton and the appendicular skeleton. The axial skeleton includes the skull, vertebral pillar and the thoracic cage. The appendicular skeleton includes the finger cymbals of the upper extremities, start out extremities, shoulder and pelvic clappers. There are five primary(prenominal) types of bones: long, short, flat, irregular and sesamoid. Long bones are longitudinal than they are wide. Examples include the humerus and femur. Short bones are ordinarily small and roughly cube shaped with vertical and flat dimensions approximately equal. (Applegate) Short bone examples include the phalanges and metacarpals. Flat bones are flattened, thin and unremarkably curved; they make up most of the skull and ribs. Irregular bones are varied in shape and size and tend to be more specialise in their location. (Shierdan) The vertebrae and some bones of the skull are irregular bones. Sesamoid bones function as pulleys to guide tendons during movement and are usually a small mass of bone that forms in high-pressure areas where extra strength is needed (e.g. the patella).

The skeletal system non only includes bones but also tendons, which colligate muscles to bone, and ligaments, which connect bone to bone, and cartilage. Cartilage both resembles and differs from bone. ( Marieb ) Cartilage is much more flexible than bone. The two main types of cartilage are hyalin cartilage and fibrocartilage. Hyaline cartilage is glass like in appearance and mostly coats the ends of bone providing a smooth slide movement at the joints. Fibrocartilage contains collagen, which gives it...

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