CSI-+What's+Eating+Gilbert+Grissom+KW

CHEMISTRY Death: (Not one single definition). -Cessation, or end, of life. -"Irreversible cessation of circulation of blood." -Heart stops beating and cannot be restarted. -Cessation of all brain activity. -First stage of death: Stoppage. -Autolysis: Cell breakdown. -Cell membranes dissolves, enzymes and other cell contents spill out and digest surrounding tissues. -Autopsy: In a suspicious or unnatural death, a forensic pathologist will conduct an examination on person. conducted to determine the manner, cause, and mechanism of death. MANNER OF DEATH: -Natural death: Caused by interruption and failure of body functions (age or disease) -Accidental death: Unplanned events, car accidents, falling. -Suicidal death: Someone kills them self purposely. (Hanging, overdose, gun, etc.) -Homicidal death: Death of one person caused by another person. examples of homicide: Bludgeoning, shooting, burning, drowning, strangulation, hanging and suffocation. Cause of death: The reason someone dies. Proximate cause of death: Underling cause, not final cause. -Mechanism of death: Describes the specific change in the body that brought about the cessation of life. -Livor mortis: death color; blood seeps down through the tissues and settle into lower parts of body. Red bloods cells begin to break down, spilling their contents. Hemoglobin- the substance in red blood cells that carries oxygen and gives blood its red color, turns purple when it spills out of the cell. Lividity- how long person has been dead. Also can give clues to the position of body. Rigor mortis: Roughly death stiffness; useful in determining time of death. (Starts at head and works its way down into legs) two hours after death. (body weight and temperature are factors) When trying to figure out time of death you will need: ambient temperature, persons weight, type of clothing, illness, level of physical activity shortly before death, sun exposure. -Algor mortis: death heat and describes temperature loss in a corpse. Stomach and intestinal contents: Examiners can determine better the time of death by studying the corpse's stomach contents. -Changes of the eye following death: Build up of potassium maybe used to estimate the time of death. 2 days of death: cell autolysis begins following death. Green and purplish staining occurs from blood decomposition, The skin takes on a marbled appearance, the face becomes discolored. 4 days of death: the skin blisters, the abdomen swells with the gas carbon dioxide that is released by bacteria living in the intestines. 6-10 days: corpse bloats with carbon dioxide as bacteria continue to feed on tissues. as causes the chest and abdominal cavities to burst and collapse. fluids begin to leak from the body openings as cell membranes, eyeballs and other tissues liquefy, the skin sloughs off. Decomposition: Rotting of all tissues and organ. Insects: Forensic entomology (records data on crime scene about environmental conditions, temperature, moisture and wind on body and below body. collects insect evidence from around and on the body.) Wasp larvae: live as parasites inside the maggots, feeding on their flesh. What affects insect development: -Temperature -Moisture -Wind -Time of day -Season -Exposure to elements -Variations among individual insects. Accumulated Degree hours: 1.	Immediately preserve some insects from the crime scene so you know exactly how old they are at the time of discovery of the body. 2.	At the crime lab, raise some of the insects from the crime scene in the same conditions as those found at the crime scene. 3.	Record length of time for development under the specific conditions found at the crime scene. 4.	Compare the insects raised at the crime lab to those found at the crime scene.