Fractures are broken bones. Most fractures occur from: * Sudden accelleration or decelleration -- car collisions, falls * Torsion -- sharp twists -- side car collisions etc. * Penetration trauma -- bullet wounds * Crushing or compression -- car acciddents, something falling on you * Repetitive Impact (jumping up and down for a few hours on a very hard surface can cause shin splints -- small, linear stress fractures).
They don't really occur in an exact spot it is always different. Sourcs: Science Teacher
The rock fractures you are describing are likely joint fractures. Joints are natural cracks or fractures that develop in rocks due to stress or cooling. When joints occur in parallel sets along flat surfaces, they are known as sheet joints or exfoliation joints.
head of the femur
Compound fractures, also known as open fractures, occur when the broken bone pierces through the skin. This type of fracture poses a higher risk of infection compared to closed fractures where the bone remains beneath the skin. Immediate medical attention is required to clean the wound and stabilize the fracture.
False
Stress fractures
Most fractures of the humerus occur in the middle of the bone, around the area of the shaft known as the diaphysis. This is due to the vulnerability of this part of the bone to direct trauma.
avulsed fragment occurs when bone fragments are pulled from their normal position by forceful muscle contractions or resistance from ligaments. Segmental fragmented positioning occurs if fractures in two adjacent areas occur
In impact testing, brittle fractures commonly occur. These fractures are characterized by little to no plastic deformation before failure, and the fracture surface appears shiny and smooth. This type of fracture happens abruptly and without warning due to the rapid propagation of cracks under the applied load.
Compression fractures can be caused by osteoporosis, trauma inflicted on the back, and tumors that have started in the bone. Tumors that occur in the spine also cause compression fractures.
The glass fractures outward from the point of impact. The particles that make up the glass break apart and move upward.
osteoporosis