2. Sponge
Read through the article on hair.
Respond with 3-4 sentences. What is hypertrichosis? What are three types of hair and did you know humans had 3 different types of hair?

3. Important Announcement!
If you have to make up any assessment thus far, it must be made up by Friday, October 25th! (Especially Unit 1 test!)
If you need to make up a quiz/test, sign up with me on the cabinet on the “quiz/test makeup.”
Tests will be handed back once everyone has taken the exam.

4. Agenda: Notes on hair and nails Video on nail health Rules of Nines
Pathology in textbook
Homework: Find one pathology of the integumentary, skeletal, or muscular system (not one discussed in class) 1 paragraph summary

5. Hair

6. Types of Hair Three types Lanugo: Found on fetuses
Created by Scott Ford © 2007 All rights reserved
Types of Hair
Three types
Lanugo:
Found on fetuses
Grow about three months after the baby's conception
Vellus Hair:
Short fine, not easily seen and unpigmented.
This is the “peach fuzz” that grows over most places on humans
Terminal Hair:
Coarser thicker, easily noticed, and usually pigmented

8. Created by Scott Ford © 2007 All rights reserved
Were does it grow?
Grows over entire body except for the palms of the hand, soles of feet and some areas of the genitalia, mucous membrane of lips, navel and eyelids
Primary function is protection
Normal hair loss on an adult head is around hairs a day
Instructor’s Notes: A common misconception is that if you shave hair it will grow back thicker then before you shaved. This is not true, shaving hair does not make it grow back faster or thicker.

9. The Rhino’s horn is made of keratinized cells, hair
Parts of hair
Created by Scott Ford © 2007 All rights reserved
Shaft:
superficial portion of the hair which projects from the skin
Root:
portion of hair below surface, penetrates dermis sometimes into subcutaneous layer
At base of each hair follicle is an enlarged structure the bulb
Instructor’s Notes: Why a picture of a rhinoceros? The horn on a rhino is made of fused together hair.
The Rhino’s horn is made of keratinized cells, hair

10. Arrector Pili Smooth muscle attached to hair.
Created by Scott Ford © 2007 All rights reserved
Smooth muscle attached to hair.
Contracts under stress of fright, cold, and emotions
Pulls hair vertically
Makes your hair stand up. Gives furry animals the appearance of being bigger
In humans give goose bumps

11. Nails

12. Nails Plates of tightly packed hard keratinized cells of the epidermis
Created by Scott Ford © 2007 All rights reserved
Plates of tightly packed hard keratinized cells of the epidermis
Consist of a nail body, free edge, and nail root
Under nail root is the nail matrix which function to grow more nail
Retrieved from: on 12/04/07

13. WebMD: Nail Health Can Reflect Your Overall Health
Created by Scott Ford © 2007 All rights reserved

14. Rule of Nines!
Way to figure out how much of a patients body has been affected by burns.

15. Rule of Nines Activity
1. What percentage of the body is burned if a reckless 16 year old male burned his back, the back of his left leg, and his entire right arm?
2.Suzie, an unfortunatey active 6 year old, was burned while playing around a fireplace. Her Nightgown caught on fire and she burned both legs, her back, her left arm, and one side of her face. What percentage of body tissue was burned?
3. A 25 year old involved in a car accident burned his chest and perineal areal. What percentage of his body was burned?
4. Marion was burned by exploding gas while trying to start his lawn mower while listening to too much pump-up-music. He burned both legs (both sides) above the knees up through his chest, half of both arms, and the perineal area. What percentage of his body did he burn? 
5. Julian burned half of his chest, a third of his back, and two-thirds of his left leg (both sides). What percentage of his body is burned?

16. Pathology! Look up the following in your textbook: Hair Thinning
Skin Cancer
Basal Cell Carcinoma
Squamous Cell Carcinoma
Melanoma
Albinism

17. LS: skin and Hair Sketch
Pg 116 figure 4.4
Must draw, label, title, and color.