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Slide 2

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Time of Death
· At death, metabolic reactions that have
created body heat slow down and eventually
stop.
· At the same time, heat energy is transferred
from surface of the body into surroundings by
radiation, conduction and evaporation of
water...
· Therefore, the temperature of a body can be
useful for estimating time of death during the
first 24 hours post-mortem.…read more

Slide 3

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Time of Death
·The cooling of the body follows a sigmoid curve...
·Initial temperature plateau normally lasts 30-60mins
·However, this may not always be the case as other factors,
such as, if the person has a fever or is suffering from
hypothermia, can effect body temperature at point of
death too, by elevating or depressing it…read more

Slide 4

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Rigor mortis
1. After death, muscle cells become starved of oxygen,
and oxygen-dependent reactions stop.
2. Respiration in the cells becomes anaerobic and
produces lactic acid.
3. The pH of the cells falls, inhibiting enzymes and thus
inhibiting anaerobic respiration.
4. The ATP needed for muscle contraction is no longer
produced. As a result, bonds between the muscle
proteins become fixed.
5. The proteins can no longer move over one another to
shorten the muscle, fixing the muscle joints.…read more

Slide 5

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Signs of decomposition
First sign of decomposition
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lower
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green
and
tract
tissues,
abdomen
and and
from this
lysosomes,
this
causes
is due
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appear
and
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smellthen
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sulphaemoglobin
become
cells. -skin...
black
body
bloated. in. the
blood.
deflates.…read more

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