1. Body Tissues and Decomposition
Objective: To learn how to differentiate between the various tissues found in the body.

2. Types of Body Tissues Epithelial Tissue Connective Tissue1. 2. 3. 4.
Epithelial Tissue
Connective Tissue
Nervous Tissue
Muscle Tissue

3. Voluntary vs Involuntary
Have _________ control
Involuntary
Do not have ___________control
conscious
conscious

4. Epithelial Tissue layers dependent on the function
Arranged in various _____
# of layers is ____________
layers
dependent on the function

5. Epithelial Tissues (Continued)
Function:
Covers, lines and protects
Found:
Skin, lines organs

6. Connective Tissue matrix provides support
Cells are arranged in a _______, which _____________
matrix
provides support

7. Connective Tissue (Continued)
Function:
Bind, support and hold
Found in :
Bones
Cartilage
Tendons
Fat (adipose)
Blood

8. Nervous Tissue Function: Coordinates and controls body activity
Sends and receives messages

9. Nervous Tissue
Found in the brain spinal cord and nerves

10. Neuron

11. What does striated mean?
Muscle Tissue
Produce movement
Types:
Skeletal Muscle tissue
Moves bones
Skeletal Muscles
What does striated mean?

12. What does striated mean?
Muscle Tissue
Cardiac
Makes the heart pump
Only in the heart
Smooth
Organ movement
Stomach and other organs
What does striated mean?

13. Types of Tissues Chart Type of Tissue Function Found Picture
Cardiac Muscle
N/A
Skeletal Muscle
Smooth Muscle
Epithelial Tissue
Nervous Tissue
Connective Tissue

14. x Characteristic Skeletal Muscle Tissue Cardiac Muscle Tissue
Smooth Muscle Tissue
Voluntarily Controlled x
Involuntarily Controlled
Striated
Single Nucleus
Multinucleated
Attach to bones
Found in walls of stomach and arteries
Move bone
Found in the heart

15. Connective Tissue

16. Case 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.
What type of tissue was Eddie’s couch made up of?
Give an example of where this type of tissue is found

17. Case Study #2 Jeffery Dahmer
What type of tissue would be found in Dahmer’s stew?
What is the function of that tissue?
Dahmer was a cannabalistic serial killer. His favorite meal consisted of a soup made from human brains and spinal cords.

18. Case Study #3 Hannibal
Which type of tissue would be found in his meal?
What is the function of this tissue?
Which other organs can this tissue be found in?
Hannibal was a cannibal who loved to eat stomach and lungs mixed with fava beans.

19. 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.
Which type of tissue(s) did his dogs eat?
What is the function of each type of tissue?
Which muscle did his dog’s eat?

20. Case 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.
Which type of tissue(s) would be found in Snookie’s remains?
What was the source of the tissues?
What do you think happened to her organs?

21. Case Study #6 Jason Vorhees
Looks like Jason met his final match. His body was discovered last week in a ditch. The digestive and respiratory organs were missing.
What type of tissue would be found in the organs?
What is the function of the tissue?
Which organs were removed from Jason’s body?

22. Body Cavities
__________ internal organs
Protects/holds

23. Decomposition
The __________ of tissues of a dead organism
breakdown

24. Decomposition
The __________ of tissues of a dead organism
breakdown

25. Stages of Decomposition
Initial Decay
Putrefaction
Black putrefaction
Butyric fermentation
Dry decay

26. Stages of Decomposition http://www.youtube.com/watch?v=7e6jxW07RdU

27. Initial Decay Within _____ days after death 2
Bacteria digest internal organs (autolysis)
Skin marbles
______ decomposes
Turns ___________ 2
Blood
Also called the fresh stage
greenish-purple

28. Putrefaction week Within a _________ Body bloats
Gasses released from
____________
Body fluids being to __________
bacteria
leak out
Coffin Birth

29. Black Putrefaction Within ______days 10-25 Flesh appears _______
Strong odor
Skin _________ off
Gases escape
Body _________
10-25
black
falls
collapses
Also called active decay. The most body mass is lost during this stage due to insect activity

30. Butyric Fermentation ________ days 20-50 “_________” smell Cheesy
Butyric acid production
Body begins to dry out
Odor and insect activity ________
Why?
20-50
Cheesy
Also called advanced decay, odor and insect activity lessen
lessen

31. Dry Decay _______ days Hair disappears Only _______ left 365 bones
Why?
Only _______ left
365
bones

32. Estimate the time of death

33. Factors that Effect Decomposition
Temperature
Hot vs cold
Moisture
Amount of clothing
Placement
Naked bodies decompose faster than clothed bodies, higher temps tend to dry out a corpse (preserves it), Moisture speeds it up, Decompose quickly in the air as opposed to in the water or if buried

34. Forensic Entomology https://www.youtube.com/watch?v=Np0hJGKrIWg
Use of insects to aid an investigation
Blow Fly
Use _____________ to estimate TOD
Attracted to putrescine and cadaverene
Other _________ feed on ___________ insects and the body
life cycle
insects
existing

35. Insects and Decomposition

36. Blow Fly Life Cycle color spiracle slits
Look for change in size, shape, and ________
Larval stage: # ______________
color
spiracle slits

37. Fly Life Cycle

38. Insects and Stages of Decomposition
Initial Decay:
Putrefaction:
Black Putrefaction:
Butyric Fermentation:
Dry Decay:
Determine which type(s) of insects are found on a body during each stage of decomposition

39. Victim #1

40. Victim #2

41. Victim #3

42. Victim #4