Ch.5 postmortem physical changes
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24 Terms
Brought on by forces of nature (gravity) molecules change but do not change chemical composition of body
Physical postmortem changes
Physical postmortem changes (6)
Algor mortis, dehydration, hypostasis, increased blood viscosity, liver mortis, endogenous invasion of microorganisms
Cooling of body temp to match environment
Algor mortis
Dehydration
Loss of moisture
Hypostasis
Gravitation of body and fluids to dependent (lower) areas of body
Increase in viscosity of blood
Post mortem thickening of blood caused by loss of liquid portion of the blood to tissue spaces.
Liver mortis
Post mortem intravasular blood discoloration brought on by presence of blood in dependent (lower) surface vessels of the body
Endogenous invasion of microorganisms
Relocation of microorganisms in body as a result of the cessation of metabolic activities
Contact pallor
Areas where blood movement (flow) has been inhibited
Hypostasis can be responsible for
Liver mortis (discoloration)
Hemolysis can cause
Post mortem stain
Liver mortis is a result of
Hypostasis (blood in dependent surface vessels)
Liver mortis happens
30-90 mins after death
Discoloration of Livor mortis depends
on blood volume and viscosity
How can livor mortis be cleared?
Arterial injection
Dehydration can be from
Evaporation or gravitational
Surface evaporation
Passage of air over surface of the body
Elevated area dehydrate
More quickly
Dehydration is accompanied by increased blood viscosity creating
Sludge
Extreme dehydration (dessication) can
Slow the further decomposition of bodies
Increased viscosity of the blood
Postmortem thickening of the blood caused primarily by the loss of liquid portion of the blood to tissue spaces
What part of the blood is liquid
Plasma
What part of the blood is solid
Rbc, wbc, platelets
Movement of these organisms
Chemical and physical changes
Movement of the body
Passive recirculation of body
Thrombus breaking apart and relocating
How mobile intestinal bacteria are