The alveoli are tiny air sacs in the lungs where oxygen and carbon dioxide exchange occurs. They are surrounded by capillaries, allowing gases to move between the air and the blood. The bronchi and trachea transport air but do not participate in gas exchange, while the pleura is the membrane covering the lungs.
Lacerations occur due to tearing of the skin caused by blunt trauma. Unlike incised wounds, which have clean edges from sharp objects, lacerations have irregular, jagged edges.
The chain of custody ensures evidence is preserved and accounted for throughout its collection, storage, and analysis. This is critical in forensic science to maintain the integrity of evidence used in legal proceedings.
Coagulative necrosis is typical in ischemic injuries, such as myocardial infarctions (heart attacks). The tissue architecture is preserved initially, distinguishing it from other types of necrosis like liquefactive necrosis, which occurs in the brain.
