Body Tissues and Decomposition

Body Tissues and Decomposition

Body Tissues and Decomposition

Objective: To learn how to differentiate between the various tissues found in the body.

Objective: To learn how to differentiate between the various tissues found in the body.

Did you know . . . .Did you know . . . . The skin is the largest organ in the

human body The “tickle” signal flows through

the body at 200 mph It is impossible to tickle yourself

The skin is the largest organ in the human body

The “tickle” signal flows through the body at 200 mph

It is impossible to tickle yourself

Eddie GeinEddie Gein

1. Why do you think Gein killed people?

2. How did he obtain some of his victims?

3. Which type of tissue(s) did Gein use to make furniture?

1. Why do you think Gein killed people?

2. How did he obtain some of his victims?

3. Which type of tissue(s) did Gein use to make furniture?

Body TissuesBody Tissues

Types:1.2.3.4.

Types:1.2.3.4.

Epithelial TissueEpithelial Tissue Arranged in various

_______

Why does the number of layers vary?

Arranged in various _______

Why does the number of layers vary?

Epithelial Tissues(Continued)

Epithelial Tissues(Continued)

Function: Covers and lines

Found: Skin, lines organs, respiratory tract

Function: Covers and lines

Found: Skin, lines organs, respiratory tract

Connective TissueConnective Tissue

Cells are arranged in a ________

How does this help?

Cells are arranged in a ________

How does this help?

Connective Tissue(Continued)

Connective Tissue(Continued)

Function:Bind, support and holdFound in :1.Bones2.Cartilage3.Tendons4.Fat (adipose)5.Blood

Function:Bind, support and holdFound in :1.Bones2.Cartilage3.Tendons4.Fat (adipose)5.Blood

Nervous TissueNervous Tissue

Found in the brain spinal cord and nerves

Found in the brain spinal cord and nerves

Nervous TissueNervous Tissue

Function:Coordinates and controls body activitySends and receives messages

Function:Coordinates and controls body activitySends and receives messages

NeuronNeuron

Muscle TissueMuscle Tissue Produce

movementTypes:1.Skeletal Muscle

tissue Moves bones Skeletal Muscles

Produce movement

Types:1.Skeletal Muscle

tissue Moves bones Skeletal Muscles

What does striated mean?

Muscle TissueMuscle Tissue

2.Cardiac Makes the heart

pump Only in the heart

3.Smooth Organ movement Stomach and

other organs

2.Cardiac Makes the heart

pump Only in the heart

3.Smooth Organ movement Stomach and

other organs

What does striated mean?

Types of Tissues ChartTypes of Tissues ChartType of Tissue Function Found Picture

Cardiac Muscle N/A

Skeletal Muscle

N/A

Smooth Muscle N/A

Epithelial Tissue

Nervous Tissue

Connective Tissue

Characteristic Skeletal Muscle Tissue

Cardiac Muscle Tissue

Smooth Muscle Tissue

Voluntarily Controlled xInvoluntarily Controlled x xStriated x xSingle Nucleus x xMultinucleated xAttach to bones xFound in walls of stomach and arteries

x

Move bone xFound in the heart x

Voluntary vs InvoluntaryVoluntary vs InvoluntaryVoluntary Have conscious controlInvoluntaryDo not have control

Voluntary Have conscious controlInvoluntaryDo not have control

Case Study #1 Eddie GeinCase Study #1 Eddie Gein Eddie Gein

skinned all his victims and used their skin to make furniture. He made a couch out of several people.

Eddie Gein skinned all his victims and used their skin to make furniture. He made a couch out of several people.

a) What type of tissue was Eddie’s couch made up of?

b) Give an example of where this type of tissue is found

a) What type of tissue was Eddie’s couch made up of?

b) Give an example of where this type of tissue is found

Case Study #2 Jeffery Dahmer

Case Study #2 Jeffery Dahmer Dahmer was a

cannabalistic serial killer. His favorite meal consisted of a soup made from human brains and spinal cords.

Dahmer was a cannabalistic serial killer. His favorite meal consisted of a soup made from human brains and spinal cords.

a) What type of tissue would be found in Dahmer’s stew?

b) What is the function of that tissue?

a) What type of tissue would be found in Dahmer’s stew?

b) What is the function of that tissue?

Case Study #3 HannibalCase Study #3 Hannibal Hannibal was a

cannibal who loved to eat stomach and lungs mixed with fava beans.

Hannibal was a cannibal who loved to eat stomach and lungs mixed with fava beans.

a) Which type of tissue would be found in his meal?

b) What is the function of this tissue?

c) Which other organs can this tissue be found in?

a) Which type of tissue would be found in his meal?

b) What is the function of this tissue?

c) Which other organs can this tissue be found in?

Case Study #4 John Dillinger

Case Study #4 John Dillinger

John Dillinger was found dead in his home. His dogs began to eat his remains, their favorite cut of meat was Dillinger’s gluetus maximus.

John Dillinger was found dead in his home. His dogs began to eat his remains, their favorite cut of meat was Dillinger’s gluetus maximus.

a) Which muscle did his dog’s eat?

b) Which type of tissue(s) did his dogs eat?

c) Which tissues would be the most abundant?

d) What is the function of each type of tissue?

a) Which muscle did his dog’s eat?

b) Which type of tissue(s) did his dogs eat?

c) Which tissues would be the most abundant?

d) What is the function of each type of tissue?

Case Study #5 SnookieCase Study #5 Snookie The remains of

Snookie washed up along the Jersey Shore yesterday. All that was left of her was a few pieces of tanned skin and a complete skeleton.

The remains of Snookie washed up along the Jersey Shore yesterday. All that was left of her was a few pieces of tanned skin and a complete skeleton.

a) Which type of tissue would be found in Snookie’s remains?

b) What was the source of the tissues?

c) What do you think happened to her organs?

a) Which type of tissue would be found in Snookie’s remains?

b) What was the source of the tissues?

c) What do you think happened to her organs?

Case Study #6 Jason Vorhees

Case Study #6 Jason Vorhees

Looks like Jason met his final match. His body was discovered last week in a ditch. The circulatory and respiratory organs were missing.

Looks like Jason met his final match. His body was discovered last week in a ditch. The circulatory and respiratory organs were missing.

a) Which organs were removed from Jason’s body?

b) What type of tissue would be found in the organs?

c) What is the function of each tissue?

a) Which organs were removed from Jason’s body?

b) What type of tissue would be found in the organs?

c) What is the function of each tissue?

Body CavitiesBody Cavities

________ internal organs from _________

________ internal organs from _________

DecompositionDecomposition

______ _______ of ______ of a dead organism

When does death occur?

______ _______ of ______ of a dead organism

When does death occur?

How long does decomposition take?

How long does decomposition take?

Dependent on:1. Environment

E.x.

2. Situation E.x.

Dependent on:1. Environment

E.x.

2. Situation E.x.

The Body FarmThe Body Farm

http://www.youtube.com/watch?v=KkNdCSW1n_g






Stages of DecompositionStages of Decomposition

1. Initial Decay2. Putrefaction3. Black

putrefaction4. Butyric

fermentation5. Dry decay

1. Initial Decay2. Putrefaction3. Black

putrefaction4. Butyric

fermentation5. Dry decay

Stages of DecompositionStages of Decomposition

http://www.youtube.com/watch?v=7e6jxW07RdU






#1: Initial Decay #1: Initial Decay

Within 2 days after death

Bacteria digest internal organs

Skin is stained Green/purplish staining Blood

decomposition


Bacteria digest internal organs

Skin is stained Green/purplish staining Blood

decomposition

#2 Putrefaction(AKA Bloat)

#2 Putrefaction(AKA Bloat)


Skin blisters Gas released by

bacteria causes the body to bloat


Skin blisters Gas released by

bacteria causes the body to bloat

#3 Black Putrefaction#3 Black Putrefaction

10-20 days after death

Parts of flesh appear black

Gases escape Body collapses


Parts of flesh appear black

Gases escape Body collapses

#4 Butyric Fermentation#4 Butyric Fermentation


“Cheesy” smell due to butyric acid production

Body begins to dry out


“Cheesy” smell due to butyric acid production

Body begins to dry out

#5 Dry Decay#5 Dry Decay


Hair disappears

Only bones left


Hair disappears

Only bones left

Factors that effect the Rate of DecompositionFactors that effect the Rate of Decomposition

Rth???Corpus BRth???Corpus B

Estimate the time of deathEstimate the time of death

What is Forensic Entomology?

What is Forensic Entomology?

The use of ________ that inhabit a ________ to aid ___________

The use of ________ that inhabit a ________ to aid ___________

Insects and Stages of Decomposition

Insects and Stages of Decomposition

Initial Decay:

Putrefaction:

Black Putrefaction:

Butyric Fermentation:

Dry Decay:

Initial Decay:

Putrefaction:

Black Putrefaction:

Butyric Fermentation:

Dry Decay:

Estimating Time of Death Using the Fly Life Cycle

Estimating Time of Death Using the Fly Life Cycle

Adults lay eggs:Day 1:

Days 2-5:

Adults lay eggs:Day 1:

Days 2-5:

ContiunedContiuned

Days 6-19:

Emergence:

How does this help an investigation?

Days 6-19:

Emergence:

How does this help an investigation?

Victim #1Victim #1

Victim #2Victim #2

Victim #3Victim #3

Victim #4Victim #4

Eddie GeinEddie Gein

Body Tissues and Decomposition

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