The skeletal system forms the structural framework of the body. Fracture is defined as a break or cracks in the bone. Types of fractures: (i) Greenstick fracture - This fracture occurs in the young bones of children. This fracture break is incomplete leaving one side of the cortex intact. (ii) Closed fracture: It is the one where the haematoma (blood clot) does not communicate with the outside. (iii) Open fracture (Compound fracture): In this type of fracture, haematoma communicates with the outside through an open wound. It is a serious injury through which infectious germs may enter into the body. (iv) Pathological fracture: This type of fracture occurs, due to pathological lesions after a trivial violence in a weak bone. It may be due to hyperparathyroidism. (v) Stress fracture: It is a fracture occurring at a site in the bone, due to repeated minor stresses over a long period of time. (vi) Birth fracture: It is a fracture occurring in the newborn babies due to injury during delivery.