【文章內(nèi)容簡介】 es: They are more serious than boxing injury and much closed with parts of kicking , found in the lower extremities, perineum and lower abdomen and so on. Third : bite wound 1. concept: the wound bit by human or animals teeth. 2. mon sites: in the face, upper limbs and prominent part of the body, such as ear, nose, lips, tongue, nipples, etc. 3. the sharper incisors and canines can leave two relative damage on the victim’ s skin like an arc ,often with flaky abrasions, bruising or contusion. 4. bite injuries shape is related with the teeth size, force and bite position. 5. meaning: ▲ Compare personal identification based on the suspect’ s model and the real bitten . ▲ extracting saliva left on the site of the bite → blood typing ▲ inferring cases based on bite site : Such as: when bite side is face, it is related with women disputes。 And when on the face, lips, tongue, vulva, etc, adulteryrelated, When in the murderer39。s arm, shoulder, hands, etc, it is struggling to resist . Fourth : stick injury 1. Cylindrical sticks injury characteristics: Injuries on relatively flat body can be formed into strip contusion. The width of contusion is smaller than the diameter of the stick. Intradermal and subcutaneous skin will be bleeding while it is most serious in central portion, both sides of which is the gradient without obvious boundaries。 If human soft tissue lucrative parts are hit with a faster pace, it can cause subcutaneous hemorrhage like bamboo hit, and hollow area in general is still smaller than the diameter sticks。 The blow to the head with cylindrical sticks can be formed the strip or oval hematoma, because of cushion of skull under the scalp。 If the force is so strong that can be a laceration along the longitudinal axis of the strip stick. The hitting with the end of cylindrical sticks can form curved laceration. 2. Square column shaped sticks injury： Hit the soft tissue of the body with the edge vertically ,which can cause a narrow strip contusion. And a stripshaped laceration can be caused by hitting the bone padded part with it’ s edge. Hit with the plane vertically, which can cause stripshaped subcutaneous hemorrhage Vertical bash, which can cause hollow subcutaneous hemorrhage 3. Irregular stick injury： .. Bough, trunk or something else. due to fall :Injuries caused by the collision of the moving body and the stationary objects when fell from high place( include sudden fall), belongs to a special pattern of mechanical injury (pound blunt injury). 2. Formation mechanism and affecting factors： （ 1） Acting force→ ground=counter acting force （ 2） Affecting factors： ● Concerned with the weight, height, speed and the acting force( impact force), . the heavier and higher the body is →V↑→F↑→ the more serious it injures. ● The impact part of the body and the way of contact ： ※If the head lands first, craniocerebral injury can be very serious, and death can occur immediately. ※ 。 If the feet lands first, symmetry fracture may happen to the bilateral calcaneal and embedding fractures may happen to the knee. ※If the buttock lands first, usually the pelvis may be fractured, the force conducted along the spine which leads to the fracture of skull base ※If the chest lands first, the ribs may be fractured substantially and the thoracic an may be injured extensively. ※If the palm lands first, multiple fractures and dislocations may happen to the upper limb ● The properties of the ground： The harder the ground is ,the more sever it injures.（ Connected with the action time) ● Obstruction potential energy can decrease segmentally by degrees . b. There may be a injury which cannot be explained by fall 3. Characteristics of fall injury: （ 1） Common features of injury： a. The surface injury is less sever but the internal is more sever. b. Usually focused on the side of bearing surface. c. Indirect injury is more sever than the direct injury.( Concussion injuries) d. The injury is widespread and varied in shape, including abrasion, contusion, laceration injury, fractures, etc. Visceral injury’ s features are multian and multiple. e. The direction of fracture is arranged consistently and symmetrically f. All of them are caused by a violence . g. Most of the high fall died immediately. （ 2） Cause of death： a. Common causes of death： ● Severe craniocerebral injury caused death. ● Hemorrhagic shock caused by the rupture of vital an. b. Elves ： ▲ Fat embolism caused by long bone fracture. ▲ Drown. identification Including accident、 suicide、 murder. ① crime scene investigation ： Starting point of the fall（ footprint、 handprint、fingerprint or remnant of the dead） Landing point:（ Leave marks, bloodstains, articles when bump against the ground） Determine the falling part； ② Measure the height of the fall and is there any obstacle； ③ Distance measurement between the corpse and the building （ The difference between postmortem and suicide） ； ④ Investigation of the case， whether the victim is consciousness ,and whether he or she is drinking or taking drugs。 ⑤ Complete and systematic anatomy is especially strict with clothing （ Sharp Instrument Injury） One、 Definition instrument injury： Refers to injuries caused by articles with sharp edge of tip ： incised wound、 chop wound、 stab wound、clip wound （ 1） Incised wound： ① Sharp edge of the blade oppress the skin and move along the axis of the blade edge created incision wound. The sharp instrument which caused the wound is cutting instrument, for e