1. The integumentary system by Kelly Hutchison R.n.

2. What covers the outside of the human body?
Even though we call this the skin, it is really a body system called the integumentary system.

3. Objectives for this unit:
A. Label a diagram of a cross section of the skin
B. Differentiate between the two types of skin glands
C. Identify six functions of the skin
D. Provide the correct names for three abnormal
colors of the skin and identify the cause of each
abnormal color
E. Describe skin eruptions
F. Describe the diseases of the integumentary system

4. Also called organ because it contains several kinds of tissues
Skin has been called a membrane because it covers the body
Also called organ because it contains several kinds of tissues
Most studies called it a system because it has organs and other parts that work together for a particular function

5. There are 3 layers of skin:
Epidermis
Dermis
Subcutanous fascia or hypodermis

7. Epidermis Outermost layer of skin Made of five to six smaller layers
Two main layers
(1) Stratum corneum: outermost layer
where cells constantly shed
(2) Stratum germinativum: provides cells
to replace cells in strata corneum
Contains no blood vessels or nerve cells

8. Dermis Also called dorium or true skin
Has framework of elastic connective tissue.
Contains blood vessels, lymph vessels,nerves, involuntary muscle, sweat and oil glands, and hair follicles.
Top of the dermis is covered with papillae.

9. Papillae (located on top layer of dermis)
Fit into ridges on the stratum germinativum of the epidermis
Ridges form lines or striations on the Skin
Pattern of ridges is unique for each Individual
Pattern is used for fingerprints and footprints
Form a method of identification

10. An Arch goes from one side to another.
Loops
Arches
Whorls
A Loop starts and ends at the same side, which is the side of the opening.
An Arch goes from one side to another.
A Whorl is roughly circular, with the ridge lines going all the way around.

11. Subcutanous Proper name Subcutaneous fascia or hypodermis
Innermost layer of skin
Made of elastic and fibrous connective
tissue and adipose (fatty) tissue
Connects skin to underlying muscles

12. The skin has glands:
Sudoriferous (sweat)
Sebaceous (oil)

13. Sudoriferous glands Coiled tubes that extend through dermis
Sweat glands
Coiled tubes that extend through dermis
Open on surface of the skin at an opening
called a pore
Eliminate sweat or perspiration that contains water, salts, and some body wastes

14. Sebaceous glands Sebum: Oil glands Usually open onto a hair follicle
Produce oil called sebum
Sebum:
Keeps hair from becoming dry and brittle
Antibacterial and antifungal secretion so it also helps prevent infections
Blackhead or pimple occurs when oil glands becomes plugged with dirt and oil

15. Hair (another part of the integumentary system)
Consists of a root that grows in a hollow tube called a follicle, and a hair shaft
Helps protect the body
Covers all body surfaces except for the palms of the hands and soles of the feet

16. 2007 Guiness World Record longest hair in the world
JUST FOR FUN FACT

17. Alopecia or baldness Permanent loss of hair on the scalp
Genetic condition
Common in men but can occur in women

18. Nails- Protect the fingers and toes from injury
Made of dead keratinized epidermal epithelial cells, which are packed closely together to form a thick dense surface
Cells formed in nail bed
Cells will regrow if lost if nail bed is not
damaged

19. Injury to nail bed can result in
white spots on nail or abnormal
shape of nail itself

20. View powerpoint 2 next!!