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Autopsies

Autopsies. Intro. By law, deaths that occur under the following circumstances must be investigated: Violent crime, suicide, or accident Within 24 hours of entering a hospital or as a result of surgery

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Autopsies

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  1. Autopsies

  2. Intro By law, deaths that occur under the following circumstances must be investigated: • Violent crime, suicide, or accident • Within 24 hours of entering a hospital or as a result of surgery • A natural death when a doctor is not present or the patient is not under the care of a medical facility • Occurs in police custody or in a correctional facility • Results from a communicable disease that may pose a threat to public health

  3. Autopsy Basics • Performed by a forensic pathologist – a medical doctor who is trained to identify why and how someone died and present those finding in court. • At the scene – Postmortem interval is estimated (amount of time since death) • In the ME’s office: • Determine cause, manner & mechanism of death

  4. Procedure 1) A Y-incision is made on the torso to expose the inner organs

  5. Procedure • Each organ is removed, weighed, carefully observed, and a sample is taken and sent to appropriate people • Toxicology • Histology • Neuropathology • Serology

  6. What to look for: • Blood for DNA – ME’s collect blood from arteries for identification and toxicology (determines drug & alcohol content). Dried blood on skin could be from perpetrator • Semen – If sexual assault is suspected • Hair – a “control sample” is collected to compare to unknown hairs found at the scene • Tissue – Tissue samples are sent to histology for analysis • Fingernails – Could contain DNA from perpetrator if a violent crime • Bite Marks – Images sent to forensic odontologists

  7. Close Up • Everything is put back in place and a “baseball stitch” Is used to close back up. • A report is made….. And yes…. They have to use complete sentences and punctuation counts.

  8. Now you try! • Go to: http://australianmuseum.net.au/interactive-tools/autopsy/ - You must use internet explorer! (http://bit.do/GH6 ) Describe in 8-10 sentences the procedure of an autopsy. Points counted off for missing sentences or short sentences obviously used to fill space.

  9. Now you try! • Go to: http://webcom4.grtxle.com/khforensics/VirtualAutopsyPackage/VirtualAutopsy3_fs.html ( http://bit.do/GJf ) Do 2 autopsies then have the program email me the results: Cassie_Torres@RoundRockISD.org

  10. Biomolecules Review! • Carbohydrate • Proteins • Lipids • Nucleic Acids

  11. Proteins: • Account for more than 50% of the dry mass of most cells, and are instrumental in almost everything organisms do. We will cover these in great detail.

  12. Food Examples:

  13. Lipids: • Monomer- monoglycerides and fatty acids • Polymer-Triglycerides: Glycerol, and 3 Fatty acid chains • Phospholipids • Jobs in the body: • Long-term energy storage • Makes up cell membranes • Sending messages to distant cells (hormones) • Insulation and protection of us and our cells!

  14. Food Examples:

  15. Carbohydrates: (sugar!) • Main source of energy for life on earth • Monomer-"Simple sugars" monosaccharides (glucose, ribose) • Jobs in the body: • Immediate energy • Labeling a cell • Cell walls in plants

  16. Food Examples:

  17. Nucleic Acids: • Monomer: Nucleotide • Composed of a nitrogenous base, a sugar, and a phosphate group. • Combine to form DNA • Polymer, DNA, RNA

  18. Food Examples • Uhhhhhhhhhhhhhhhhhhhh……… • Stomach Contents Lab next class!!!

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