1. Integumentary system

2. The integumentary System
Made up of: 1. 2. 3.
Function:
_____________ the body
Skin
Hair
Nails
Covers and protects

3. Layers of Skin 1. Epidermis 2. Dermis Humans have __________
6 or 7 layers

4. Epidermis keratinized Made up of flat __________ cells
Composed
of mostly ________ cells
which eventually fall off
waterproofs skin
dead

5. Melanin Found in the __________ Provides: 1. 2.
Amount produced is dependent on:
Epidermis
UV protection
Skin Color
Amount of sunlight exposure
Genetics

6. Who produces more melanin?

7. Which person has a greater chance of getting skin cancer? Why?

8. Table Talk
Which person has a greater chance of getting skin cancer? Why?

9. Tattoos and Tanning Tanned _________ cells fall off epidermal
Are permanent, so ink is injected into the ____________
epidermal
dermis

10. Albinism Is the _________ for an organism to produce ____________
inability
melanin
genetic

11. Is this an example of Albinism? Why or why not?

13. Is this an example of Albinism?
If an animal’s eyes are any color other than pinkish-red or pale blue, it’s NOT albino.

14. Dermis Second _______ layer of skin Composed of: 1. _______ cells
2. ___________ structures
Second
Living
Specialized

15. Specialized Structures within the Dermis

16. Specialized Structures within the Dermis
Blood Vessels
Carry oxygen and other nutrients
Arrector Pili Muscle
Moves the hair
Sweat Gland
Produces and releases water, salts and urea
Sebaceous (Oil) Gland
Produces and releases sebum
Sensory Receptor
Responds to environmental stimuli
Hair Follicle
Provides nutrients which allow the hair to grow
Melanocyte
Produces melanin

17. Sebum Prevents ______ loss and softens ________
Released by the __________
water
skin
Sebaceous gland

18. Structure of Hair Made up of dead _________ cells keratinized Cuticle
Shaft is composed of:
Cuticle
Cortex
Medulla
keratinized 25

19. The Cuticle Human Hair Scale pattern is different between species
Deer Hair 26

20. The Cortex
Contains melanin
Gives hair its color 27

21. The Medulla
Shape is different between species
Is wider in animals

22. Determining Species Determine species by using: ___________
Scale pattern
Shape
Cuticle
Medulla 29

23. Identify the Species
Cat Hair
Human Hair
Deer Hair

24. Cattle Hair
Cat Hair
Human Hair
Dog Hair 31

25. Identify the Species
Human Hair
Human Hair

26. Examination of Hair Hair can’t be ____________ to one person connected
Follicular Tag only source of __________
connected
DNA 33

27. Hair as Evidence
Origin
Forcefully removed

28. Hair Samples You must also draw: Human Hair Cat Hair Dog Hair
Horse Hair
Make sure to label:
The cuticle
The cortex
The medulla
Reference page 360 in the forensics book
Guinea Pig
Hair
You must also draw:
Human Hair
Cat Hair
Dog Hair

29. Hair Samples Cat Hair Dog Hair Human Hair Make sure to label:
The cuticle
The cortex
The medulla
Reference page 360 in the forensics book
Dog Hair
Human Hair